Advice please! My family is heading to the Magic Kingdom next weekend - Sept. 4-5, when the park is supposed to be pretty empty. (The crowd calendar is a 1 of 10 both days.) Since the lines shouldn't be too bad, is it worth messing with FP+? Our must-sees (like everyone else) are Space Mtn, Splash Mtn, the Dwarf coaster and the Elsa/Anna meet and greet. I have not bought tickets yet and I'd like to just wait till we arrive. The only argument I see for buying them ahead is to be able to do FP+.