Why do you need to have power when moving? Trying to keep the pipes from freezing? Wouldn't it be smarter to run empty and drain your low point drains before driving in such low temps. Maybe add antifreeze to areas where you might not be able to get all the water out? I assume this is the only reason you want to have power. Just winterize or do as much as you can. I think if you filled your fresh water, assuming you need water, a full tank wouldn't freeze even with 8 hours of driving. When you get where your going, plug in or run the gen.