Like Abraham mentioned, I wouldn't want to be a camp host (you can also be a camp host in a commercial campground) unless you are very familiar with the particular park and know and like the rangers or campground owners. Some campgrounds (typically non-commercial ones) get really crazy on weekends with drunks, loud music, etc, we've been in a few of those

Volunteering is fun and RVing is fun - we have 90,000 miles on our motorhome, bought it brand new in 2005 and no plans to stop going and blowing.