I own guns, but I officially don't have a hiking/hammock gun yet.
I was looking at either a Bond Arms .45lc Derringer at 20oz, Kahr Arms CW45 .45acp at 21oz or a Ruger LCR .357 at 17oz.
My only reason for getting one of those would be if I woke up with a Black Bear clawing at my hammock with me in it, and the bear is unphased at me yelling and screaming like a little girl. I need something small and lightweight for hiking, but with a caliber strong enough to stop a black bear at close range.
I'm also debating if I should just skip the gun idea and go with bear spray.
Storing the gun, I would keep it in the hammock with me. Not much good if its in your pack out of reach. Maybe sew a pocket in your sleepingbag or overquilt?