Had I went, it would have been 2200+ miles round trip.
I have been averaging 11 mpg here in Colorado so I would assume it would be a bit better on the flatter ground in the central USA.
I also weigh close to 28,000lbs loaded so all in all not bad, though I would be about 3000lbs lighter going to Goshen because I would not have the Toys with me.
I would probably average 12 mpg for a Goshen trip and approx. 190 gallons.
I run 65-68 mph on flat land. I would also most likely use about 2.5 gallons of DEF on the trip.