Vote for more law & order?
I don't know how likely it is that thieves would be interested in camper beadlock wheels/tires, esp. on vehicles larger than pickup trucks/jeeps and would think the stuff inside the truck/camper is far more valuable & easier to offload. Then again we live in a comical sort of age where a growing number of lowly individuals will actually steal catalytic converters. I've never found a good solution for securing an unattended vehicle, esp. a camper full of all sorts of good stuff. More specifically, I am unaware of any wheel security system that a competent thief cannot easily get around or incompetent thief will just damage the wheels in the attempt e.g. using a battery-powered angle grinder. Given the availability modern tools & knowledge the best security is perhaps your planning and choice of parking/storage location. Generally, if you leave any vehicle unattended at a remote location/trailhead/etc. thieves will be able to take anything they want, so plan carefully.