Anyone ever go into public service after financial independence?

Got a question for you folks. I'm not in a position where I "need" to go back to work....but I am kind of bored and I've always been involved in community projects, scouting leader, coast guard auxilliary, pheasants forever, etc.... I'm thinking of getting back to some sort of work, but not corporate - more of a public service aspect. Any of you done that? What were the challenges you faced?