I stand corrected - the GCWR on the 09 F350 is 26k - 15k pulled trailer, 17,700 on a 5th wheel. So then I wouldn't need to deal with permits or fuel tax, just my DOT/MC number and insurance. The F450 on the other hand, GCWR is 33k, 16k pulled, 24,500 5th wheel. I think that's a tad overkill...