This is my 1st trip to WDW with children (they'll be 2 1/2 and 5 when we go. I reserved a Minivan with Dollar rent a car thinking that it would be equipped with integrated car seats, only to be told that only some have such seats and I won't find out if it's available until I arrive. Renting car seats for my trip will be well over $100, but I don't really feel like lugging my own. Any suggestions? Does anyone have any experience with actually getting a minivan with integrated seats at Dollar? What are my chances? Thanks