At the end of last fall we purchased our first in a long time travel trailer, and the first that we will be towing anyplace. Previous trailers were parked on site in campground and never moved. Anyhow...
I agree with going with the mobile tech. You will be paying dealer prices and you likely will not be present when they do the check over. With a mobile tech you can go thru it with him and see for yourself what may be needed. You can more likely negotiate prices for any needed repairs. Now, I don't mean to try and low ball him on his hard work, just try to save on the shop rate a dealer will charge you.