Often I will go in (say, Saturday to Saturday vacation) and book the last Thursday or Friday with 7 Dwarfs, and Frozen, then look for earlier in the vacation dates/times. That way, at least you have one. Then, when you finalize your plans you can drop what you don't want. Example: we had tickets for the Mickey's Halloween party last night. The party is 7 pm to 12 am. I booked Space Mountain 3:20 - 4:20, 7 Dwarfs Mine Train 4:20 - 5:20, then Splash Mountain 5:25 - 6:25. Since I was doing the party only, I could only get in at 4 pm (they let party goers in early). However, in the event I didn't make it early, (checking into the resort), I also booked identical reservations for this upcoming Thursday. Yesterday, we got into the party around 3:45, ran over and did Space Mountain; by the time we got off, it was time to get on the Mine Train; After getting off, we went over to Splash Mountain, and rode that. So far, I have changed Splash Mtn for Peter Pan, and will drop the Mine Train later this week. I'll probably keep Space Mtn as I want to go on it again. We are going back Thursday mainly to watch Celebrate the Magic, Wishes and Main Street Electrical Parade.