I don't think most campground owners have enough electrical work to pay for a fulltime electrician on their crew, but they would probably love to have a qualified one if they also did other work. You probably wouldn't get paid what you are worth, but that is perhaps negotiable for extra pay when you do tasks that require your skills. And you might find a campground that has a backlog of electrical work or some special projects in mind.
I've done quite a bit of electrical work while workamping - owners are usually happy to have you once they get confidence in your skill level (I'm an experienced amateur rather than a pro). It's usually pretty basic stuff, though - finding broken wires and bad connections, verifying good neutrals and grounds, replacing outlets, etc. I've found and cleaned up more than a few "butcher jobs" in older campgrounds too, but never got much pay for it.
Plumbing skills are handy too.