I know this should probably be in the workcamping forum, but it is totally related to Mexico and it probably won't get flooded with "You will be murdered" responses. I am doing a RV Caravan Wagon Master trip from Nogales to Mazatlan (You have to make your way back since I fly out or there after on Sept 26). It will cross on Sept 17th and take about 10 days. Its purpose it teach at least that route, border crossing paperwork procedures and operating procedure. It is free, sort of, You have to pay your own fuel, tolls and insurance. They will cover RV Parks, a couple of meals and a tour or 2 sample. 2 couples and one single on this trip are already slated to lead trips this season and other joining may not get the chance for a year or 2, but they do always come up eventually. Obviously it works best for retirees. They also need people to lead French trips. Send me a PM if it interest you. One couple is already well known on this forum. I did it for many years and enjoyed it, although there were some awkward customers in the mix.