There's an idea. Still have to arrange for car rental though and it's a 4 hour drive from Jacksonville to the resort, so flying out of orlando would be nicer on the way home so we wouldn't have to drive 4+ hours to return the car.
A lot of times you can rent a car in one place and return it in another, I think.
Yeah, as the others have said, you'll be able to rent another car... That, or if you didn't want to sit in a car, you could fly to Jacksonville, and out of Orlando, and there is this small airline I constantly hear commercials for that have one way flights in the SE for like $20. I want to say it's called Spirit, or something like that. Although I'd personally rather drive the 4 hours, than have to go through the nightmare that an airport is.
Also, pretty sure it's a lot cheaper to fly to Jacksonville, and you can rent a car on Hotwire for like $10/day if you don't mind getting a POS.