Possible Clues:

• Camper owners, for short
• Camper enthusiasts, informally
• "The ___" (Discovery series about camper owners)
• Campsite hookup users, in brief
• They use Winnebagos on their vacays
• Camper owners, briefly
• Many KOA patrons
• Camping enthusiasts, for short
• KOA users
• Campground users, briefly