Maroubra SUP said..
Interesting horizontal rack, Gosup. Did you make them yourself? Decent quiver too. I'll need weatherproof racks, dynabolted into a rendered brick wall. Unless there's good reasons not to, I'm aiming to go vertical. Dj, what are your reasons for preferring vertical systems?
Originally we developed these racks in-house in attempt to utilize offcuts and as a means to increase the productivity of our CNC routers, the racks also suit vertical storage (equally to horizontal - but you don't need a pair!-$) when fixed at about mid height of your longest board, obviously this depends on how short your shortest board is?
I agree with DJ's preferences and logic for vertical storage, like Tom Carroll's commercial height unit

My only alternative would be to utilize an external wall or a tall gable roof end? The big issue as your aware is how to cover your quiver and hide it from straying eyes or any opportunists?
Let me know if you need any assistance and good luck with the decision process?