The bare minimum that guests expect is a free place to park for the night.  RVers are used to being self-sufficient so please don't feel you need to do more than greet them and show them where to park.  On the other hand, many hosts enjoy the social aspect of sharing stories, a meal, a campfire, or even showing guests around their area.  What you do for one guest, you don't have to do for all.

Guests may prefer to do things on their own or they may be on a schedule. Don't be afraid to state your preference.  Most guests will take their cue from the host.