If you're talking about a timeshare type of place, the closest is Westgate Resort on Turkey Lake Road. I don't know if they have shuttle services or not but I would guess they do.
I'm looking at the rates for large 1BR condos at Westgate Lakes and the prices are incredible ($67/night). We figure we could rent a budget car with the money saved, and hit Disney, Universal, and Sea World on our own. We'd probably end up paying more for the park tickets, but I'm going to see if my AAA agent will get those for me in advance. The resort looks really nice and also has a lot of ameneties - has anyone else stayed here?
I was looking at Westgate Palace - much closer and states you can walk to WetNWild. If anyone has any info on that I would be very interested. Thank you. ALthough unfortunately neither place has a shuttle.