How best to improve a primitive RV site to rent it out?

With no electricity, water or sewer they will be a real tough sell to most RVers. Maybe if you advertise on an off grid forum you might find some takers but the sites would have to be cleared so solar would work. Sounds like they are far enough apart that nobody will notice that that the neighbors only shower once a month when it rains. Also need someplace to dump contents of composting toilets.