The key is...we are VOLUNTEERS! When we start looking for new "employment" (and we only stay at a park for 3 months only) the questions I always ask are:
Do you have 50 amp?
Do you have sewer for us?
Does the site have Verizon access?
What exactly will our duties be?
And how many HOURS ARE YOU REQUIREING for the site?
Look at it this way: I conduct the interview with the volunteer coordinator, not the volunteer coordinator interviewing me.
Our max is 40 between the 2 of us. PERIOD. And I inform each and every supervisor that we will have of that fact and have never had a problem. We are NOT employees, we are volunteers.
Been doing this for 4 years now and have never had a problem with sites that we selected to volunteer at. But I have had to say NO to a few. Oh by the way...we do nothing but federal parks.