I do the same as Royb, keep my 2000i in the back of the truck under a soft trifold tonneau cover. I do keep it locked in there with a better bike lock, but that's just to keep the walk by thief honest. Also have a locking tailgate, between the cover and the tailgate it'd take a bit of work to get to the generator. I believe just being out of sight is the best preventative that I'm willing to take. With the 8' bed the trifold does not get in the way of hitching up, fairly cheap at $400, and more or less easily removed.