First off, Steel Fan, it's funny how something so innocent one place can have a completely different meaning somewhere else. Now where I come from the remark about your girlfriend and a cigarette means something REALLY different. Guess that's one of the hazards of living in the "Redneck Belt". <img src="/ubbthreads/images/graemlins/doh.gif" alt="" />
I concur (I thought we were talking about a grab and dash kind of scenerio) and would PROBABLY go with

Ruger 77/22 (or probably my 10/22 as I already have one) or a good .22 pistol of some kind, one that you can shoot WELL. It (at least round here, in rural areas) would provide a means of securing food and work for defense in a pinch. If restricted to only one knife, a good quality (one of the kinsman)if possible in a 7-7 1/2 inch blade for ease of carry and would work for about anything you need to do. (but I wouldn't have only ONE blade, I am never without a folder). If carrying a shotgun, it would be in 20 guage, packs enough whallop and the shells are lighter than a 12, not to mention less recoil lighter to carry as well. Oh well, my 2 c for what it's worth

But if I had to nail it down right now, I would go with:

RIFLE ruger 10/22 for the light weight, accuracy and ability to carry lots of ammo the weight

PISTOL Sig P225 9mm

KNIFE Jack Crain Commando (it's the only QUALITY blade I have in this length until the S5 gets here), then you know what it would be.