In the ‘80s, I used to drive the 470 miles (750km), 7-8 hour (there’s always too much congestion in LA) from Dublin, CA to San Diego, CA trip by myself non-stop. I’d fill up my gas tank before leaving, take snacks and soda with me, and not stop for food, drink, restroom, or gas until I got to San Diego. Of course, I was in my 30s at the time and the car I was driving had a large gas tank (they’ve shrunken gas tanks over the years to get cars into lower weight-classes for fuel-economy purposes, so the driving range has decreased even though the fuel economy has increased). My bladder was apparently much larger back then too! ;–)
I had a Discman hooked up to car stereo and listened to my favorite CDs the whole way. ;–)