Well, I've got several single shot rifles and shotguns, but I'm not too hip on the idea of carrying a golf bag out in the woods with me so I can choose which firearm to use for each particular opportunity *grin*
So when I go woodsbummin', I, like Scottman carry a single shot shotgun and an 8" insert and a dozen or so cartridges for it in my coat pocket.
If I'm going out with the intent of hunting big game though, I'll bring my New England arms .30-06 singleshot or my H&R Shikari .45/70.(or even more likely, one of my SKS's)