Since we like to save diesel, we pull over a lot. I can't believe how fast people travel these days, but then again we are retired. Anything faster than 55 mph and it is hard for us to smell the roses. The ride is often more fun than the destination.
The only time we pop up into the 70s is when we are traveling with friends. Surprisingly none of our friends we have traveled with so far like to poke along the way we do. Unfortunately the price of our leisure is frequent pull overs, which I guess eats into our attempt to save fuel. My rule is when more than 3 cars/vehicles follow us, time to look for a SAFE place to pull over.