When you get to exit 329, Wildwood, off of I-75, there is a truck wash station that should be able to wash your coach. This is where the Florida turnpike branches off.
Since it is "that time of year" in Florida, when all of the oak trees are dropping their pollen and every vehicle is getting coated with a yellow powder, I would wait for another week or so before I even bothered with washing my coach.
