How good are you at diagnosing and fixing thing, that is the real question. Both Good Sam and Coach Net offer on the phone technical support to help you get yourself out of little problems. Is that worth the annual fee? I guess it is to me. If the Ford coverage will tow your Class C series E you may not need the towing coverage...does it cover the RV or is it excluded since it was added to the original body...I really don't know.
Maybe I'm just wasteful, but my RV insurance includes roadside assistance, and I still have Good Sam, and if I'm traveling with the kids they have AAA RV since they have a boat. Overkill.
Happy Trails.