You’ve laid out two requirements: nationwide cruiser and homestead worker. The best engine for one may not be for the other.
That said, the 385hp 6.2 is plenty for the job of tower, if you go by Ford tow ratings (22k GCVWR with the 4.30, I think 19k with the prevalent 3.73). Ford indicates reducing that by 2% per 1k feet, so you need to calculate a little margin if you want the best performance.
Don’t be thrown by the comparison responses on here from those that have had earlier generation or smaller gas engines in the 300hp-range. Some users on this forum, like ib516, have switched from diesel to gas and towed in the Rockies to good effect. I have pulled my 12k horse trailer around the mountain west with my gasser Ford and have no complaints on performance; see my post history for more. I don't tow much, do a lot of short trips and chores on my land, so the gasser is right for me. I have 34K miles on my 2005.
See also: YouTube TFLtruck Ike Gauntlet towing tests for high altitude high grade; they’ve tested several 6.2s up that 7 mile run to good results.
No question the 6.7 is faster and better performing at altitude, but the 6.2 can get it done for the weights its rated. For range, the longbed has a 38G tank (50G in the new 2017+).
Ord