The investment needed for your "Skoolie Camp"..would be the same investment needed for a RV park. So, for your investment to be worth while, just open an RV park that welcomes skoolies?
First thing you should do is check what the rules/requirements are for Indiana as well as the local area. I'm in Ohio...if I only had 4 sites (or less) then I wouldn't be subject to state licensing, inspections, etc.
I've offered discount camping to people on this forum for a while now....so far, no takers. So a Skoolie specific park most likely wouldn't generate enough revenue to cover your investment.