16+ yrs nothing taken from the campsite but had stuff stolen from storage propane tanks, batteries, and spare tires. Not enough to make me change my lifestyle just enough to lighten my wallet.
As far as campsite goes I leave everything out I will lock my car doors when I'm gone and wrap a chain though my honda geni but that's its between bikes and other camp stuff maybe $2K of stuff out and stealable with out much effort but I trust campers.
My Ice chest has been gone through before but since I keep my Rum in the freezer the thieves didn't seem very happy with diet cokes and juice boxes but I think that might have been the camp neighbors who made a beer run later
When we used a pop up we went away for 3 days from our campsite to backpack and forgot to put our chairs and tables way at camp a neighbor broke into our trailer and put our stuff away for us because of rain.