Nostatic,
You might want to consider an investment in something like this. It folds down compact and then you can get all those nice guns off the ground and out of the dirt.
The benches, I suspect would be a welcome item if your out there for a long time. It all folds down compact too and is lightweight.
http://www.tailgatingpartysupply.com/Coleman-2794A690-CLM1079.html
I have an old Marlin lever rifle that is a .22 and I love it. I am going to try that shotgun trick, my Remington put some nice bruises in my shoulder last weekend.