All the mounts they make are to high from the mounting surface which adds to the shaking and vibration, forget the brackets they sell.
My solution was to make my own which sits solidly onto the surface I'm mounting it to so I get no real extra vibration for any brackets.
I made one for my fork the bracket is molded to the shape of my fork and the camera is mounted directly to it their is no extra play anywhere its solid.
For wind I put a small piece of weather strip over the mic it cuts wind noise down on the video by 70-80% I'd say.