What is more stressful to my family is walking into any theme park and one of us saying "What do you want to do?" "I don't know, what do you want to do?" "Well what is there to do?" and a child chiming in with "I want to do so and so!!!" and then there is a long wait for that ride and we end up doing something else. By that time we are stress and the kids are upset. LOL
Our plan for WDW is structured and researched, but since I have a good grasp of the options available, if we get there and want to change something, we can without stress.
I actually find the planning and the race to schedule and move things around, fun.