Thanks for all the info and advice so far. Right now the truck has only 315 miles on it. After driving to Vegas it will have just over 2000. So as far as the "break-in" it should be okay. I haven't weighed the boat and trailer together yet. NADA guide says the boat weight 4550lbs without fuel and gear. I plan on servicing the trailer when I get there i.e...bearings, lights, tires, etc. The truck as a tow mode on it which should help with the shifting and right gears. No transmission cooler on it though. Should I get one prior to trip? Really nervous about this trip...don't want to damage my new truck. I'm in no hurry so plan on taking it nice and slow. Pretty flat land except about a 2000-3000 ft elevation change thru parts of Utah and Wyoming.