Key West rv parks
They have Boyds on Stock Island, which is right next to Key West about 1/4 mile or so from the island and about 3 miles from Duval Street. Nice and quiet. I can't remember the one downtown's name, but it was always extremely crowded and EXTREMELY expensive.
Also, there is Leo's which is on Stock Island, too. When I stayed there in 95 it was 20 a night. Last time I called to check their prices, they easily went up, I'm thinking 40 or 50 a night. Can't exactly remember though.