Hm. No, I've never heard of that group, actually.
I am not surprised though, a lot of retirees work either out of their rigs or in seasonal jobs. One outfit I have heard of is 'workcampers' as I have talked to one or two of them. They match up jobs with short term RV folks.
I will say I've thought about getting a part time job doing something in Tampa, just to keep me in ammunition. Just not sure what I'd do.