KISS ... the simple answer is to go camping with no valuables at all. Leave them at home or lock them in the car out of view. You can do what I do, and that is take them with you when you go walking away from the camper. Yep, usually it's just the camera I care about, as it has all my memories contained within ... everything else is replaceable ... it might be annoying, but they are all easily replaced. Laptop passwords are easily bypassed, most camping equipment is easily removed and is hard to trace by cops.
Alternately, paint everything in a garish hippie pattern, forcing theives to look elsewhere for less easily identifyable goods.
At home, we use a "screamer" (otherwise known as a
Cuda motion alarm), Klamps, heavy chains and highly rated locks, a hitch lock and a BCDKATS (Blue Cattle Dog Keyless Anti-Theft System), but these are really only deterents for the honest guy who will think it's too much hassle to get passed the dog first. I have considered coating the CT in Dots, but you can paint over them with fantastic success alas, so not really worth the money unless you can get them somewhere inside the chassis, but then how does the nice police man see them?
Kit_e
P.S. We do have lockable boxes all over the place as an alternative (on both car and camper).