Hello B-n-B,
We had a 2000 F-350 Crew Cab SWD but it had 221K so we upgraded to an F-450 Crew Cab Dually. You need a good platform under your 5th wheel when towing and the dually adds to your stability. We went with the Keystone Fuzion 39' with a 12',(144"), garage, width 102", smart cars have a length of 104", a three wheel trike bike has a 109" length, they each have about 40" of width. The trike weighs more than the car, the car will reach speeds of 60mph but it is unstable when used on major roadways where there is high semi truck traffic.