OK, I will bite. Do you unhook and then drive to the pump? Seems like a big waste of time if that is what you are doing. But then I guess I am retired and have plenty of time too. I have a 52 gal tank but at 10 mpg I am good for about 400 miles before I start looking for some place to fuel. I also may stop sooner if GasBuddy tells me that the prices are better earlier in the trip. In any case, no matter how easy it is to unhook a 5th wheel I am not going to take that time just to save $5 in fuel cost.
Right now fuel prices are all over the board. It is still $4 or more in some places and $3.50 in others.
Sorry, I took this off track.