OP - Thanks for sharing this info. Sorry others are not able to find anything on the internet, but quite often life is able to go on without the internet's awareness
Everyone must do what they fell comfortable with, here is what our family does, and it is reviewed often:
-Situational awareness. LOOK at where you are, and if in doubt, get out of the location. (Anywhere, driving or walking does not matter.)
-If being approached, and you have any doubts. Make noise and be vocal. Stay open, and try to avoid being grabbed.
-If grabbed, fight to stay in the open, and continue to be loud while doing the best you can to cause pain to an attacker(s).
-Specifically in our RV, but also similar in our home. We have a few areas of stashed pepper spray, and also a can of wasp spray. Even when sitting outside, we keep the bay open that has a can of wasp spray velcro'd to the inside bay wall for easy access. Good for in needed to protect against animals, non human, too.
-Inside the coach, we travel with two stashes of emergency money. 1) Is an envelope that says 'Emergency Cash', that we keep in the cabinet just over the front door. (Also with a can of pepper spray velcro'd just out of sight in side the frame of the cabinet.) This envelope is 'Throw away money'. I keep it low with about $100 bill, folded over 3 $20's.) If it ever comes necessary, anyone who is traveling with us is able to use this to hopefully keep a robber out of the coach, or get them out by saying this is 'our stash'. Our second envelope is stashed away where only my wife and I know it's location, and yes, it is for emergency usage on the road. We keep enough to cover our expenses for two months, so in case of natural or man made disaster, we have some funds to use when cards and checks may not be.
We do not want to hurt anyone. But having been around drug user's, especially meth users, we know that sometimes these people no longer 'think properly' - their wires can become so crossed, that their brains just are not able to process properly. So, I have worked with my wife, and other close family members, to be prepared. If in doubt, use pepper spray or wasp spray, make noise, including the small little air can sirens. PROTECT YOURSELF.
If that were ever to hurt some individual that was attempting to do harm, or rob, a family member. THAT IS AN APPROPRIATE RESPONSE. I also have a handgun in our RV, and if I ever feel that I need to shoot someone to protect my family, or myself, or my belongings - again, THAT IS AN APPROPRIATE RESPONSE. And, I will face any ramifications needed. (To be clear, if I see a kid or young teenager say taking off with an outside chair or BBQ - I would not use lethal force in that situation.) But if anyone is touching a family member or myself in order to get something off of us, say a watch/waller/ring - I don't care how young they are, they've cross the line and will face the repercussions of their choices.
It's a strange world when we have Government Officials going after parents of Free Range children. And when the Mother of a Would Be Thug teenager had Child Protection Agency reviewing her beating of her kid around the head to get him to go home. And when too often honest citizens are at risk for defending themselves against thugs...
Everyone must do what they feel is correct to them. I do not look the other way. I do not turn my cheek, when appropriate not too. I do speak out. I do write my representatives on how I want them to represent my beliefs. I wish more would do so too. Whatever their beliefs might be.
Be safe, have fun, go travel - and as mentioned, don't let the fear of what could happen keep you from enjoying this thing called RV'ing. Be aware, and use common sense - but go!