I agree with many of the previous posters that the cheap $1 store ponchos are the way to go. I usually take a couple per person to wear in case of a shower and/or on very wet rides. After they are used, you can throw them away or give them to other less prepared guests entering very wet rides. The best thing is that you don't have to lug a wet poncho around for the rest of the day. Granted, I have been lucky enough to not have to deal with alot of rain on my WDW trips. If it were raining all day, perhaps I would decide to go with a mickey poncho. Who knows?