99% of the time it is the GPS that you will be using and that will provide value when driving your RV. I have been using the Garmin 760 for 4 years and it is designed for RV and pro trucker use and provides for routing based on the length of your RV and whether you are towing a trailer and its length. It shows current speed limit where you are driving and provides advance alerts when entering a reduced speed zone as with schools and fire stations. Easy to download and update the maps year to year.
Where I saw dash camera in widespread use was in China and with all their novice drivers who are even worse than the drivers one encounters in the USA (though not anywhere near as aggressive as American drivers who are the worst in the world in this respect). Think back over your entire life as a driver and how many times a dash camera would have been useful and whether a front view would have been enough. I had an elderly man drive into the rear of my SUV and a dash camera showing the front of SUV would have been worthless. His wife was in the car and she swore to the deputy that I had stopped suddenly and caused the accident and the deputy wrote up the report that way. Cost me $3500 to get the charges dropped by the corrupt DA in Monterey CA and I had to hire an attorney and a private investigator (who found that the deputy's report includes a good deal of information that was made up and not supported by actual witness statements).
