Hi captain. Most posts have either been the forks on the handlebars or a kolpin style mount for a hardcase off a cycleracks rear rack/passenger pegs. I am scared of the handlebar forks mostly for the vibration right to my bow. If on smooth roads it may be fine. I don't have cycleracks so I have no idea on that one. My best option is to use my backpack, which has the kuiu bow holder kit added to a non-kuiu backpack. That way it is secure to my back, which feels less vibration. But it is a pain for moving in the seat and would be trouble in the event of a get off/wreck. I would think the other backpacks that secure the bow to the pack would also work, as long as the lower cam does not go below your tailbone, which would cause it to hit the seat. I have some trouble with that using the kuiu system too.
I would love to hear a good option, so let us know if you find one that works for you.