About 100 miles is on The Natchez Trace Parkway. Most is about the crookedest road I have been on but mostly level road. It is not a road to run out of steam on. Most of it that I am on is in the backwoods of nowhere. Many years ago, my daughter and I along with her then very young kids were coming back home. We forgot to get gas before leaving my hometown. I mean it was way past the E and no gas stations anywhere that we knew of. We drove about 90 miles on fumes and prayers. We made it to our exit and got to a station just off the Trace. Never happened again and I make sure I fill up before leaving my hometown. I do not like for it to get below 1/4 tank. One lesson learned.
My wife and I have a rule about half tank being the limit. The power on the island can go out with little warning, so no gas until it comes back on.