If that 200 miles is like the mileage claimed for new cars, likely it dies around 150-180 miles unless all downhill.
If you need to run your airconditioner, or your heater and defogger... forget about it!
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.