How about dipping the lower couple of inches in Polyurathane, letting it dry then drill a small hole through it. then you can use a Tie tac to attach it to your shirt or jacket.
Mine's pretty long too. I wear goggles when I ride, no windshield. A bandana tied bandito style would work but you might not want to ride through the drive-up bank teller then.
Mine is only about 5 inches, but already bothers me sometimes.
I won't cut it though...just an occasional trim.
If it gets longer, it'll be a rubber band or a bandito-style bandana for me.
The beard isn't so bad without the windshield on the Road King.
With the windshield, the updraft just blows it into my face.