I have heard of items disappearing to a lot of unseasoned RV'ers ;)
I like Sue never leave anything outside that will attract any type of varmints; either on 4 legs or 2.
The people in the site next to us had their beer fridge cleaned out last year. The people down the laneway had their Plastic lawn ornaments taken and someone in the Provincial campground on August Long weekend lost a rubber dingy, however they did find that across the lake at a trail head, paddle and all a couple of days later.
So it is not as uncommon as some people think, up here anyways.
Like at home I lock-up / put away everything that I hope to have the next time I want it.
Soup