You can not pull a firearm to scare someone away that is against the law almost everywhere. Yes I saw a need to have a weapon when two female rangers one was severely injured by a large man that was shooting at signs as he drove through the park, luckily he dropped the weapon. If I had not helped the rangers they may have been more than hurt. At Lake Mead campground a husband was killed the wife raped and then shot and later a ranger was killed. I went a couple of years without shooting a while back and my skill had not diminished. I spent many years in law enforcement and as assistant director of a state law enforcement academy and trained park rangers. in my opinion if you carry something very concealable like a ruger LCP is best and a r.v. wall will not stop buckshot or slugs what then. pulling a firearm is a absolute last resort and if no one can tell that you carry a weapon you are safer, the last thing I ever want to do is have to hurt someone but worse than that I do not want to lose my life. so the best advise I can give is be safe out there