30' Flying Cloud with Toyota Tundra
We have a 2010 30' Flying Cloud that tows fine with a 2011 Toyota Tundra Double Cab SR5 (5.7l, 4WD, tow package, AT). We just came back from two months in Florida (1100 mile tow each way) and everything worked fine. The trailer was pretty well loaded for the trip down (about 7500 lb) and the truck was at GVWR (7100 lb). The GCWR for our Toyota is 16,000 lb. A few things make life better. 1) put Firestone Ride Rite air springs on the rear to take the extra tongue weight (the rear springs on the Tundra are soft and no amount of weight distributing hitch adjustment can get the rear ride ht. correct w/out the air springs), 2) put adjustable rear shocks (like Rancho's) so you can control the bouncing with the heavier total rear spring rate, 3) put the pull-out tow mirrors on (with the convex bottom) because the AS is really wide!, 4) pick your towing speed (with cruise control) so the transmission doesn't hunt; it depends on how hilly and how much head wind. We usually tow on interstates between 60 and 67 mph. We get 10 to 11 mpg consistently. If you try to run at 70-75 mph you will need to tow a fuel tanker also.
I'm going to look into an aux. gas tank so I don't need to tank up so often (every 180 to 200 miles leaving some gas in the tank for an emergency).
Watch out that a 30' Classic can be a lot heavier than a 30' Flying Cloud (10,000 lb vs 8800 lb fully loaded).