I say do what you want when you want. You're going to run into lines at Disney. It's a busy place. It can be REALLY busy depending on the time of year you go. Those books will drive you crazy, you'll waste so much time worrying whether or not you're doing the right thing on a vacation you'll take all the fun out of planning it! I base my decisions more on making Magic Kingdom my first park no matter what (personal choice) and if I can get the dining choices I want and go from there. Enjoy your trip!