I prefer vertical also, but everyone doesn't consider rods an item to tiptoe around like most of us do. An actually I'm testing this one in a cargo trailer at the campsite, a lot more secure than the boat and keeps them out of camper. Back to my first statement.
I'm actually wanting to build an insulated secure locker out in my shop for my rods, just tossing ideals around before I start on it. Shopped for 8 foot safe but gave up on that. Most people don't realize how much is invested in our equipment, you would think by now you could find safes for our gear.
If I was storing overhead, I think that I'd look into a sheet of 3/4" plywood and hinges for attic access so They would mount on top of the plywood, be protected and would fold down for easy selection. could double the storage for something else on the other side. Plus would be out of view for sticky fingers.