Wishing you the BEST DAY in DLP and DCA! I am a big believer in the rope drop -> 3 - 5 pm nap break at hotel -> park close schedule, and since you will be staying at Grand Californian, you might be able to make that work. I'm not sure what park hours will be like when you're there. If Disneyland is opening at 8 am (or earlier) and open until midnight, then you'd have time. But if they're back to 9 am opening and 10 pm close... I don't know that I would even go back to the hotel at all during the day.
If you don't want to take the time away from the parks for a nap, then something I have done is schedule a late lunch or early dinner at a sit down restaurant where I can relax for a good 45-60 minutes.
It looks like you have only World of Color on your list of must-dos, and as a WoC fan, I think that's the right choice. I really hope it's playing while you're there!
Regarding touring strategy, I just want to put in a plug for Casey at SoCalDaily. She is in the parks all the time (often taking the early train up from San Diego the morning of!) and her touring strategies have NEVER steered me wrong. You can find her suggestions for doing both parks in one day, with Genie+, starting in Disneyland,
here.
Back on the topic of food, I
absolutely highly strongly very much recommend Jolly Holiday! Not only does it have delicious food (their breakfast croissants are amazing, and I've never had a bad pastry there), but it's a beautiful spot and relaxing to sit there for a bit just off Main Street and people watch. if you're lucky, you'll hear some musical entertainment too. One place to eat in Disneyland that could give you a calm,
quiet bit of relaxation time is Hungry Bear Restaurant, over near Splash Mountain. I also like Rancho del Zocalo in Fantasyland, and the food over at Red Rose Taverne in Fantasyland is pretty good.
If you're going to get a drink at Lamplight Lounge... I dislike all shellfish, but I love the Lobster Nachos there. Unless you get a reservation at Lamplight Lounge, you're still going to be spending some time waiting on the walkup list, so why not combo this and make it a meal? If that doesn't end up working out for you, I would hop on over to eat in Sanfransokyo Square. I LOVE Aunt Cass Cafe's curry in a breadbowl dish, and the food nearby at Cocina Cucamonga is also highly rated.