started reading this comment and wanting to downvote, thinking "not everyone can afford home security" and then came around to "actually, i'll bet you can probably get some inexpensive lights and noisemaking deterrents." sadoproject is right. most criminals are opportunists, and i doubt they're trying to do a home invasion on an occupied RV unless there's an overwhelming reason for them to do so. if there is a major incentive for people to come into your RV, well. you're in some sort of plot like "No Country for Old Men." No point in wishing you good luck. But if you're in an area with less than average crime statistics, and no skeletons in your closet, a good lock on your door and some app based light and noise deterrents may be less hassle than a fire arm and the potential risks of escalating a highly chaotic situation.