If you are retired military, then there will be a dry camping spot for you in Key West, otherwise, unless you have very expensive reservations, you will probably not find any place to camp in the keys. Monroe county, the keys and most of the lower Everglades, does NOT allow dry camping(boondocking) and they strictly enforce their ordinance.
Bob & Betsy - USN Aviation Ret'd '78 & LEO Ret'd '03 & "Oath Keeper Forever"
2005 HR Endeavor 40PRQ, '11 Silverado LT, Ex Cab 6.2L NHT 4x4, w/2017 Rzr 4-900 riding in 16+' enclosed trailer in back.Where the wheels are stopped today