I recently retired and took my time in upgrading our 5er and factory ordering a new Ford F250. (had been a Dodge man for years)
After much deliberation we opted for:
F250 SUPER DUTY,single rear wheel, 6.2 gasser, 6 speed auto trans, 4.30 ratio, 8ft long box, snow plow package for the beefed up suspension.
Cougar 327 RES, 37'4", 12,600lbs dry.
Our maiden voyage: Toronto, Canada to Nashville, TN to Cherokee, NC to Asheville NC back to Toronto. At one point we got lost and found ourselves on the Blue Ridge Mountain road.
Combo worked excellent with no issues at all.
Mileage was about 10 mpg towing which is what we have experience with a number of other tv/coach combo's.
Totaly agree that a diesel engine is ideal for towing ... but... after considering
i) initial cost
ii) maintenance cost
iii) number of miles being towed...
I just could not justify the COST/BENEFIT of a diesel.
As for dually vs. single rear wheel... again dual would give better stability when towing but being a clean freak I tend to car wash my truck on a regular basis...regular car wash outfits will not take a dually and I did not feel like hand washing my vehicle during the Canadian winters.
To each his own... but this combo works great for us.
GPG
PS: spring run... Toronto to Kissimmee, Fl.