With an 8 Inch barrel in 45/70 it is fairly easy. It is a little tougher with a 14 inch scoped but it can be accomplished.
That's a good one! But seriously, my only point is that there are a host of handguns that offer multiple shots for self-defense duties, yet are powerful enough to hunt big game with and are compact enough for
practical concealed carry. The owning one handgun for every possible contingency stipulation, imo, presupposes choosing one that best covers "all the bases".
But, all that said, the choice of a single shot pistol as you (and poster oneounceload) opted for is an interesting one. As you noted, it is
possible, I suppose, to carry a Contender concealed and having multiple barrels/calibers does offer certain advantages, particularly if you throw rimfire ammunition into the mix. And, when you consider a wilderness survival situation, the Contender's simplicity of construction and robust parts are undeniable advantages. The fact that a Contender is easily scoped (and "unscoped") is another important asset that makes it a viable one handgun candidate.
I think where you live might be a big factor in picking one handgun for every situation. A person living in, say, inter-city Detroit or Chicago, will probably have far different needs than would a person residing in a more rural setting. All the factors that have to be taken into consideration when forced (theoretically, thankfully) to pick only one firearm of a certain genre always makes the exercise an intriguing one.