For those of you with conditions that have widely varying symptoms - sometimes you're fine or almost-fine, sometimes you're in really bad shape - how much do you plan in advance for worst case scenarios? I have a seizure/nerve disorder NOS that can without warning cause some pretty significant problems with walking and movement. Should I plan on an ECV "in case," even if it means I end up essentially riding it around when I probably would have been fine? I'm used to contingency plans at home, but I'm a lot more able to just stay put there than I can at WDW. How do you handle unpredictable conditions?