We stayed at Boyd's right on Stock Island. It was tidy although the sites are quite cramped (being so close to Key West and all its amenities, I don't think you're expected to be on your site very much). It is pricey and the WiFi sucked (the repeater in our section would capture your devices but had no connectivity). On the plus side, if you get one of the sites backing onto the water you look directly across the bay at the naval air station and get a free airshow just before supper every evening as they recover the fighter formations and patrol planes.
P.S. my current avatar is at Boyds.
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam