That's a really good question. It would have to be a place where they felt comfortable hiding something, where the items could be retrieved and where they could observe any time to make sure no one had discovered them.
MO.
I've felt sure from the beginning the gun(s) were hidden on FWF land where there are so many trees, big old trees that could hold and conceal a gun.
Or somewhere under a horse stall or similar area of a barn.
There are many large and small barn type buildings on FWF.
Those kind of out buildings, horse barns lend themselves to ground that can be disturbed ( digging, hiding something) and then be easily recovered without anyone ever noticing. Make sure a horse is always in that stall and no one will ever see trace of what is underneath.
MO