Great story!
Having spent a large portion of my life hanging around with various types of bikers, I've found that most of them are pretty decent people. As mentioned before, if you show them some respect you'll get it back in return.
In August I wore my kilt at a "biker" event for the first time. Not HA type bikers, but Kawasaki Vulcan riders. Lots of interesting comments from people, and absolutely NO bad ones!