The last two pictures are from the East TExas 450 route between Rusk and Moscow. The first pics are from a route I laid out to get from near Navasota to Rusk.
I get about 60 miles per gallon, a bit less less when loaded down with camping gear and doing hiway speeds. So I can go about 220 to 240 miles before I start looking for gas. But I usually start looking for gas when I hit 200 miles just to be safe.
THe pump in the IIMS tank seems to work well. I tested it by running the tank to empty. THere was very little fuel left in the wings.