SUP rack on a boat?

[AirJunky]

So a buddy of mine is building a party barge. He lives on the lake so it will double as an extension of his dock.  In fact, he's making it just like a dock, 3 log floats, 6 plastic floats, 20' x 10' lower deck with a 8' x 10' upper deck. It'll have an 8 hp Honda engine on it to putter around on the lake, big bumpers on each side so other boats can tie up.

We're kickin around ideas for SUP racks on it. But figuring out where to put them. Too low on the sides & you can't tie up to a boat or dock. Too high & you can't see past them. Only place I can think of is upright, tied to the upper deck railing. But then the fin will probably get kicked by someone.

Any bright ideas?

[adios pantalones]

Looks like you're planning an upper deck or cover? Hang the boards flat against the "ceiling".

[AirJunky]

Yep, upper deck clearance is going to be 7' from the deck supports... Once the deck is on, clearance will be a couple inches less than 7'.
But my buddy & I are both over 6' tall. So having the boards underneath might cause some headaches (literally).
On a variation of that idea, I thought about making the upper deck railings so there is enough clearance to go under the railing, as you slide the boards on to the upper deck. Which means we'd need to cover the deck with something that won't scar up the boards as we slide them in place.