One time my husband and I made a trip back from Florida to West Virginia for his birthday. Along the way we made sure that we had sex at at least one rest area in each state. The trip took us 10 hours longer than usual.
I guess I should point out that we were traveling in a van. I for one have never understood the desire of some to actually have sex in a public restroom - that is one thing I have never done and never will.
The thought of it gives me the willies!