private campsite listings

Might just as well tell everyone the address and the price, you have tiptoed around the "no Advertising" rule so much your feet must be getting tired. Just say "where do I place this ad? RV site for rent at 123 main street Anytown USA, rent is $XXX. Site has this and that. Contact me via PM with suggestions." And be prepared to deal with the Kooks, freaks and other assorted oddities. What you are trying to sell is attractive to that crowd. Dry camping, no hookups, not even a pit toilet is worth less than national forest campsites which rent for around $7 to $10 a day. Walmart is free. I wouldn't want people on my property, leaving me who knows what to clean up (trash, dumped tanks, half burned firepits, trees you didn't want cut down, but they wanted firewood etc. All that for the gross income of $100 a month, assuming the site would be occupied 20 or so days a month which is highly unlikely. OH, and don't forget your insurance which probably won't cover any injuries or damages you are sued for when you are running a commercial enterprise without your insurer's written permission.