if you know when exactly you want to go to Universal you could always rent a car from National. Call Disney and they will tell you all about it. We did it in May/June for a few days to go to the beach, universal etc. I caught a quick shuttle at the resort to pick up the van and then did the same for returning the van. No real problems..no real inconvience and for our group it was cheaper to do this than renting for the entire 10 days only to have the vehicle sit 7 out of the 10 days.