When I began RVing alone, I felt unsafe in a canvas-covered pop-up so I traded for a hard-sided travel trailer. I felt completely safe in the trailer; however, I usually camped in a campground (private or public). I did not stay overnight in retail establishment lots because, to move on, I would have had to leave my trailer to get to my truck. I think some form of motorhome would be ideal because one never has to leave one's rig to move on. If you don't feel comfortable, all you have to do is drive away.
I never felt unsafe traveling alone. I had roadside assistance, a cell phone, a CB radio, a lockable trailer, and I remained vigilant of my surroundings. I also had a tire iron close at hand! Kathy Frazier
Kat is a member of RVing Women and we concur on safety issues while traveling alone. I don't carry a tire iron but since I have years of aikido training, I have other means of protection. No, I don't have a black belt. Aikido practioners work for years to attain the next belt level so I have a brown belt. The first six months, you learn to fall properly so you're not hurt. I fall better than anyone I know. If you want to see an aikido sensei in action, watch any Steven Seagal movie. A little trivia: When Sean Connery was filming "Never Say Never Again," Seagal was hired to train him and broke Connery's wrist.
There is quite a bit of philosophy attached to the moves and the best part of this discipline is that little strength is involved. It is suitable for all ages and levels of expertise. I've taught classes to everyone from an eight year-old boy to a 66 year-old woman with much success. Do a little reading about aikido and see if it might work for you.
Basically, be aware, be alert, be prepared and then--be having a good time on the road.