It depends on the kids and the control you have. My sister went alone with her 2 kids on several trips successfully at those similar ages, and also trips at later ages. For some trips she utilized a double stroller. They know the rules she sets down and do very well listening to her. It is more challenging keeping your eyes on 2 kids and dealing with 2 kids with different wants, needs and who are wanting to see everything and go in different directions. She knows their limits, doesnt try to do too much in a day, doesnt stay out too late, sets time aside for naps/breaks and the kids know that if they dont listen or behave they will be leaving the restaurant or park and lose out. It works much better because thats how she handles them at home too. If the parent has good parental control and the kids know it, it doesnt matter if its Disney or other places. Of course they are more excited with Disney cause its special with more to stimulate them but she reigns them in before they get too wild. So if you have good control and your kids listen to you it can be a very enjoyable trip, with others to follow.