I used to pretty much haul ass with my truck camper but noticed that I was always passing up 5th wheelers. What's your recommended interstate speed. Is 75MPH ok? My 3500 Dodge seems to like 65-70 w...
Not a 5er here, but one bodacious truck owner here with a longggggg travel trailer.... take your cue from the other 5er's "out there". 60-65 seems to be the sweet spot for all towing.
Always remember, it's not how much or how fast you can tow... it's how SAFE you can tow and maintain 100% control of your rig, under any condition.