J.F.
Good luck getting in to one of those through an RCI exchange. It is very difficult! We tried twice, both times were at low peak travel times. They pretty much laughed at us and said if you don't already own a specific week with them you don't have a chance. People just don't want to give up their week!
So, if you can't get into one of those three, I highly recommend the Hilton Grand Vacation Club at Seaworld. It's across the street from Sea World. We had a two bedroom with full kitchen. It was lovely. We did need to rent a car, though. It was worth it with the money we saved with the exchange, and we were able to go to the grocery store to buy food so we could have breakfasts and dinners there, which also saved a ton of money.
This year we are going again and couldn't get into Disney, or the Hilton Grand Vacation Club, so we are staying at the Cypress Pointe Resort (I think?)
Good luck!