Board Storage in boat house: Help!

I was wondering if anyone had an inventive board storage while boats on the lift. We have a "crepeau" style boat house so we can really make sure of a hanging cargo net like on some lifts. Please see the below photo for style of boat house. We have tried to bungee the boards to side walls but have had 2 boards go rogue and get eaten by the lady of the lake!

You sure the lady of the lake ate them? Or maybe your local thieves? Lol

If so they have really *****ty taste as they keep taking my crappy boards haha