[halfmoonclip]

'1803, what exactly are you trying to stash, and to what purpose? The area below the trunk floor should lend itself to most longarms that can be broken down, whether an AR or a double shotgun. They would be out of sight, tho' not secured beyond the normal doorlocks.
I have carry permits that are good in most states; when travelling thru' places like the People's Republic of Maryland, by law, my pistol has to be stored empty and separate from the ammo. Again, the area under the trunkfloor serves well; I use a lockbox secured with aircraft cable. A determined thief could cut the cable or force the box, but there's a limit on how much security there is room for.
So tell us some more. Long guns or handguns? Do they have to be secured, or just concealed? Or perhaps just stored so they don't whack each other?
Moon