Found some great articles about rules of the road and tour bus etiquette. Not much I can add apart from reinforcing the importance of getting to know your driver and always sleeping feet-forward. Also – no bags on seats!
Happy travels…
http://livemusicbusiness.com/14-things-you-should-know-about-touring-on-a-sleeper-bus/
http://thistourlife.com/the-bus-rules/
http://bobbyowsinski.blogspot.co.uk/2011/06/life-on-tour-bus.html?m=1