I vote you stop every 150 miles for a large coke with ice. That way you can check on the visor and load up on your "keep me awake" stuff. I use to stop for coffee but sill got sleepy until I discovered the warm coffee was contributing to my drowsiness. I switched to the coke and ice; drink the cold coke and chew on the ice then your bladder will be full and you can't fall asleep.
