Jake, you can only be in one place at a time. If you look at the schedule going forward there are very few 4+ runs in tap after mid-January. To get the St George Jeepers doing Sand Mountain trails on video you have about 3 weeks. So, I wouldn't worry to much about getting the the scenic tour trips done now. You will have all sorts of those opportunities every week starting in mid January. By the way, your videos are truly great!
You mentioned something about the temperature gauges on the Jeeps not working in 4 low. I don't think that has anything to do with it. One thing that I've noticed with mine is it seems to stop working when I'm driving real slow and the sending unit is getting heat from the engine or it gets wet. Then it just freezes at whatever it was reading last until it gets fresh dry air again.
Unfortunately I can't remember the exact mileage. I would guess it's less than 30 total miles. It took us a full day, but mostly because we're slow and like to explore.