X3 (or x4) on RV School
. They have instructors located around the country.
I would recommend the person who taught me and my wife but he and his wife are in Alaska for the summer.
They aren't cheap, but the quality of the instruction makes it a worthwhile investment.
2015 Ford F450 Platinum DRW with every option known to man (except a sunroof) towing a 2017 Heartland Landmark 365 Charleston
Me, Wife, "Navigators" Desi & Lucy [Chihuahua/Jack Russell Terrier mix]