There is a broad spectrum of RV'ers from pop-up to Million dollar motorhomes. To find a format that will be successful would have to appeal to all RV'ers. The million dollar rigs are nice but most of us are not interested in them since we will never be able to own one. For me it is just morbid curiosity. .
The restoration theme is a good one, but that appeals to a small segment as well. Doing a restoration that also addresses the common things with which most of us have to contend, like repacking wheel bearings, solving electrical problems, solving mechanical problems etc... would have a wider appeal. For the motorhomers, there is more commonality in chassis manufacturers so addressing those as opposed to a marque would be good for some segments.
Engine types, ie diesel vs gas, Jake brakes, chip upgrades for gas and diesel, engine bolt ons that improve performance, use of synthetic oils and lubricants, driving tips, engine/coach recalls, accessory recalls and a host of other items that have a broad area of interest would make good special segments or inserts in the theme segments.
One or more segments on the various RV "clubs" like Passport America that offer reduced cost camping, are they worth it, and so on.
Marque specific programs, like stripping and polishing aluminum trailers and motorhomes would interest some. Airstream is not the only manufacturer using aluminum, just the best.
Vintage trailers (over 25 y/o) have a lot of interest.
There is plenty of fodder for a program. I would love to see it.