REST AREA ETIQUETTE - Make sure when you stop at any rest areas that they are not marked as truck only. Truck drivers need to stop and have breaks on a regular basis and if they can't pull into a truck rest area they are unable to take their scheduled break. If you stop at a shared rest area make sure trucks have room to enter and exit.
CARAVAN WAVE - When I first started towing a caravan, I noticed that people towing caravans travelling in the opposite direction towards me were waving. Sometimes it's just a single index finger salute and sometimes it's a whole hand wave. I told myself I wasn't going to be doing that but you get drawn into it. I ended up waving to everybody towing a van, whether they waved back or not. It's an unspoken rule.