I'll be there the 11th through the 16th. I'm planning on rain and if it doesn't, well good. Really, it's Florida in the Spring, chances are it's going to rain. Might be a short pop up shower, might be a thunder storm, might be rain on and off all day, who knows. Just take a poncho, rain coat or umbrella, whatever is your choice and play in the rain. It will be warm enough that you won't freeze (you might melt in the humidity though) so embrace it. If there is lightening in the area, they will shut down out door rides but only while the lightening is happening. Embrace it, the parks tend to empty out when it rains so go for it. I plan on going to Epcot on Sunday, which is a bit of a bummer since I won't be there until late afternoon when the showers are supposed to happen and the F&G booths tend to close if it's bad enough but I'll adjust.