I keep a lot of records and as a matter of fact, I do have some numbers. It’s mostly raw data I have to dig out, but I looked at 4 trips, 2 with a PU and 2 with my 16’ TT. One PU trip was north through CO and WY and ID to WA and OR and back. It cost me $. 23/m. Another was to Yosemite to OR and CO and return and it ran $.31/m.
One trip with the TT was through northern CO and NM and it also ran $.31/m. The other was to Grand Canyon and around CO and it was $.67/m. I don’t know why the big jump except that the granddaughters were with us and costs go up a bunch then. Two qualifiers, those are net costs, i.e., I deduct the cost of the trip that I would have incurred if I had stayed home. And they’re converted to 2011 dollars. No depreciation on vehicles, either, because I keep vehicles a long time, too.