The annual family reunion trip is always a challenge, we are loaded heavy (taking extra things for whole family use), dry camping so full of water. 60mph speed limit with small towns along the way with 30mph speed limits. I tow near 60, even though I get better mileage running slower. On a two lane road, it gets dangerous when too many vehicles are stacked behind us, so I usually pull off in the town (just have to slow way down and run on wide shoulder a short distance, then back on road and up to speed. That way, I don't have the stupid trying to pass when it is not safe (lots of double yellow) and putting us at risk. On the freeway or 4 lane, I run whatever speed I want and they can go around me if they don't like it.