Here is my penny's worth
1. Not scared at all, but we do make sure we do not get into the wrong place at the wrong time same as we do anywhere we travel. We do not stay in the Pemex's alone any longer.
2. Yes, lots of modern RV parks, none I have found have 50 amp service, but I am good with 30amp.
3. I have the particulate burner which needs the ULSD (2008 model year engine), but have used the Mexican diesel enough now to not be concerned. I would NOT take a diesel engine into Mexico and use their fuel that needs the additive (DEF) in the fuel.
4. I am not happy with AZ. Sorry I do not mean to offend anyone who stays there, it is just not for me after going to Mexico.
5. Drug Cartels certainly need to be respected. I watch out for any druggie looking vehicles and keep my distance. I drive into the back country on a quad and in a truck exploring the countryside and have never came across anything bad.
6. We do stuff on our own certainly and have no problem going around alone. Certainly we like to travel with others more for the social aspect than security.
7. The language barrier at times can be a real set back. It would be so much more fun if we knew Spanish and could communicate with the Mexicans. Yes, the barrier does deter us.
8.Those places are great and we hear lots of good things, but as happens a lot, the first place RV'ers hang their hat for a season is always what they may call their favorite place to go.
9. I was in the Baja only once in the year 2001. It was a great trip down and back. I cannot speak from experience which if any, is safer.
8. Coming out of the Puerto Vallarta area last year we hit terrible rough roads. It was the worst I have ever seen. But they were redoing the road with new pavement, so hopefully it will make it a great ride this fall making it all worth it.
Could I add...the garmin gps that has Mexico maps is a great asset to travel with and I suggest anyone wanting to travel any distance in Mexico purchase one of these. It could save you a lot of aggravation.
Great topic and hope more people will chime in.