Charlie, those three items are a very good start to hunter ethics!
Other than those, I am a firm believer in obeying game laws. Many laws are different from state, to state. Or even region, to region. I don't have a problem with that! Obey the game laws of your area, not just the ones you agree with!
I also agree with what I'd call "courtesy ethics!" The dead deer on car tops, and distasteful Tee shirts, among other things, do nothing to promote our sport!
Remember, hunters are a minority, and I think that the anti's are an even smaller minority! It is the non-hunting, neutral, majority, that will eventually decide the fate of hunting in the future! Deliberatly doing things to offend them is not only un-ethical, it is unhealthy for the sport of hunting!