Well up here in BC I live in a small town where we all know each other waving at on coming traffic is a way of life. I can drive 4 hrs away to Kelowna and see someone from town and I wave at them and they wave back, it's kinda cool.
And yes I do wave at other RVers even if I'm not in my truck with the 5th wheel behind it. I figure that they are most likely a long ways from home and a friendly wave my brighten up there day, just a bit. Also I gigure that if the passenger doesn't see who the driver waves at it give them something talk about... Like " Walter , who do you know in Canada? " ??
Soup.