Just got back and will have to go fill up and see. I put more miles on without the trailer just sightseeing than I did with, so I will have to divide that by 20 and subtract those gallons to figure out combo MPG.
I got a scale weight at the DOT scales. 4900-5000 and 3280-3420 truck and trailer front-rear.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears