We are headed down to Southern Florida in last week of March and first week of April. We are starting from Fort Lauderdale and then heading down through the Keys to Key West. We have been looking at campsites, but the state parks are all booked solid. The private campgrounds are extremely expensive like $45+. Does anyone know about any camping alternatives? I am not afraid of stealth camping if it is do-able and doesn't have big consequences if you do get caught, but I am not familiar with this area at all. Any ideas or tips?

Also, we are looking into Couchsurfing and Warmshowers, but no one has responded yet