In my opinion, the only correct answer is to get a small handgun and keep it in a safe in your RV/trailer and keep it at your side when camping. Learn how to use it properly. Go to the range a lot and practice pulling it and shooting it.
I have gone out camping in the boonies for 25+ years. Sometimes alone and sometimes with family. There are lots of good people out there but there is only ONE TIME required for you to become a victim/statistic.
There was a time when I was with my family (wife, son and daughter) and we ran into some guys while camping in the woods. These guys came over and automatically my spidey sense started tingling. They told me they wanted to show me where some free firewood was. I said, "No thanks, we have some good firewood." They were insistant on taking me to show me where some firewood was. I kept saying no thank you but they would not take no for an answer. It got to the point where it was just plain weird.
I don't think they knew my son was with me because he showed himself in the door with a shotgun and said, "thank you for the offer gentlemen, we don't need any wood though, we're good." Then we packed up and left right after that and drove to another site.
I am quite positive that those two guys wanted to lure me away from my family to possibly cause me harm and rob, rape, steal or kill. I know that many of you have never been through anything like this so you will not feel a need to ever carry a weapon. That is fine as it is your right to do so, but I will say that I am happy my son was "packing" on that day and from now on I never leave home without carrying a sidearm.
Your campground is your home. If you would defend your home, there's no reason you shouldn't be defend your camp. All it takes is one foul encounter to end up in a bad situation. There are good people out there but there are also bad people. I'm never afraid of a bear or a coyote coming near my camp, but it's the two legged variety that I worry about the most.
Better to have a gun and not need it, than to need a gun and not have it. I recently read a story about a husband and wife and dog who were all shot and killed while camping in their RV. They weren't doing anything but just setting up. There are weirdos out there - just saying. You don't need to be Rambo, you just need to be realistic.