How do I host RVers in a work trade agreement?

by Aaron
(Northern California)

I'm looking to host an individual or couple and their RV on riverside property in a work exchange agreement.

Essentially, I'd like to provide a pad and hookups in exchange for a certain number of hours worked per week. In a perfect world, I'd be looking to host a retired tradesman, or someone skilled in one of the trades to help with projects around the property.

Are there websites just for this kind of thing? Thanks!