CONGRATULATIONS on your upcoming wedding and your Disney honeymoon! You are getting lots of suggestions and varied advice, but that's good as it gives you lots of things to consider and choose from. I'm going to add a couple here...
Hotel- We just got back from a 2 night stay at Animal Kingdom Lodge. I rented points from a Disboards member and ended up paying $215 a night for a savanna view studio. The DVC boards here have great information and make planning easier. I know... it's hard to make the decision and do it, but it's easy. Decide when you want to travel and at what resort you want to stay. Look up the number of points you'll need for this (there are plenty of charts available online) and then start looking for a DVC member who has points for sale at a price you want to pay. You contact the member, tell they where/when you want to stay, and then THEY contact Disney and set it all up. You pay the member directly, based on the points you need and the price per point that you and the member agree upon. Technically the DVC member owns your reservation, but any reputable member will send you all the Disney information, reservation numbers, etc. Our reservations have always been in our names, although the member is the one who makes special requests (like room location), will add Magical Express or the dining plan (it you want it- I don't recommend it), etc. It's easy... read, read, read. The DVC members on the disboards are a friendly, reliable crew IME; we've done DVC rentals three times and have always been pleased!
If you don't want to do DVC, we have stayed at both POP and AllStars Music. Room and amenity-wise, they are similar. Clean, smallish, but serves the purpose for a place to sleep and shower. The pools are good, the food courts are good. We like ASMu a bit better. It's a smaller resort, so less walking from the bus stop (I am not an advocate of paying extra for a closer room) and fewer people. I often make my Disney resort reservation through Orbitz. If Disney is running a sale, Orbitz usually offers the same price, and there is also often a discount code for an addition 10%-15% off. HOWEVER>.. as with everything, read the fine print. I don't know if Orbitz reservations can be canceled for free if your plans change, or canceled wit a charge. Also with Orbitz (as with most DVC rentals) I believe you have to pay in full at the time of booking (but don't hold me to this... can't totally remember). As I said above... read, read, read!
Dining plan- I don't recommend this for anyone except families that have several kids who want to do lots of character meals. We have done the DP a few times and always spend more money than if we eat out-of-pocket (OOP). Sometimes we share meals, sometimes I'll just want an appetizer and soup, etc. We are not huge dessert people- we'd rather have special yummy park snacks- so the dessert part of the DP is lost on us. We also only drink water at meals, so ditto. We find that the
DDP doesn't fit the way we like to eat. I have kept careful track and have found that it always saves us $200+ when we eat OOP, including all snacks, than when we do the dining plan. (None of this includes alcohol costs, just to keep it on an even footing).
Meals- Instead of CRT, have you considered dinner at 1900 Park Faire? We have found the food at CRT to be "meh" and the service lackluster- and the price overwhelming! At 1900 dinner, Cinderella and Prince Charming host, with the stepmother, 2 stepsisters, and 2 mice there also. The Steps are incredibly funny, and Cinderella and the Prince are... charming! The food is also good. It's a buffet, but we've always found the food to be terrific! As far as a character breakfast, I'm with you; go to Crystal Palace! You should definitely plan to eat dinner at Epcot via the Food and Wine Festival. Food is yummy, there is lots to choose from, and the cost is... well, I guess it's affordable in a Disney way, LOL! Actually, DD and I did F&W on 2 separate days, doing one side of World Showcase on day 1 and the other on day 2. We were traveling specifically to hit F&W and having 2 days there meant we got to try almost everything! We are not big fans of any of the TS restaurants at Disney Studios, so it was nice to take the boat over to Epcot to hop for supper at F&W. I STRONGLY recommend Boma for dinner! It's our favorite restaurant almost anywhere, and the food is great! I like to go there for dinner because, really: When/where else will you get African-inspired food, right? When we go to Disney, we try to stay away from places like Planet Hollywood, T-Rex, Rainforest Cafe, and most of the Italian places as we can get this type of dining experience here at home.
Dress-up dinner? For my birthday, we went to California Grill. Try to get a reservation for 90-60 minutes before the Magic Kingdom fireworks start. You can see the show from the restaurant or their outside deck, and they pipe in the audio. It's pretty special! We also really like Jiko (at Animal Kingdom Lodge) for a dress-up dinner. The food is wonderful, the restaurant beautiful, and (as with Boma), you can investigate AKL, view animals from the overlooks, sit around the fire pits for storytelling, etc.
Halloween Party- We love
MNSSHP! Love the MK after dark, love staying so late. We usually make simple costumes (based on shorts and tee shirts) and go for it. We are not big into character meets, mostly as they are huge time-eaters, but MNSSHP has some very unique characters at the party. We do the trick-or-treating and pack in the ride time. If you decide to go, the party starts at 7pm, but they usually let party-goers into the MK at 4pm (historically... not sure if this'll change this year). As we had a hard-ticket for this event, we can made FP+ for 4:30, 5:30, and 6:30, before the party started. Actually, we used this event as our MK day. We had had 2 days of long-hours park touring and needed a small rest. We spent the morning at the pool and relaxing, then had a 1:30 lunch at The Wave at the Contemporary, changed into our costumes and went over to the MK, arriving about 3:30. We stayed until the party ended and they shooed us out! It worked out really well, and felt we got a full day of MK time (thanks somewhat to the lower crowds than in MK during the daytime).
Good luck with your planning!!