30-day FP window is 100% dependent on when you are going. The first poster is going in March which is slam packed Spring Break season. Most likely you will be able to get FPs for most rides. The ones that will be more difficult (too hard to judge this far out) are Pandora, FEA, 7DMT. Most others you should not have an issue getting a FP for. You won't get the best of times, but you will get them. The ones you don't get FP for you have to hit at rope drop or wait in long lines. It is just that simple.
As for transportation, if you don't have your own vehicle, be prepared for what I would consider a horrible experience. Without a car, the best option is to Uber. Avoid parks with morning EMH. Go commando style early, then back to the resort for the afternoon (possible nap), then back in early evening. Crowd levels now are: very busy, extremely busy, and melt your face off like the German guy at the end of Raiders of the Lost Arc busy. With your Spring Break time, I would put it at the extremely busy side. By 11AM most rides will be over a 1 hour wait for the rest of the day.