Interesting topic and thoughtful posts.
I am a year or two from retirement and my dream is to camp host at state parks and national parks and forests with my wife. Maybe 6 to 8 months a year with the rest being at the S&B.
We both enjoy natural beautiful settings for our campsites and we want to explore this country. I like dealing with people and being outdoors and I'd like to get some exercise while working. Camp hosting at locations near where our children have moved to sounds ideal to me.
I would guess that working 20 or 30 hours a week for a free FHU site would be fine for me. I also suspect that I would volunteer more hours than that if I enjoyed the park and the staff.
Ed