I'd rather take a .41 mag as a minimum. But I don't see why a good .357 with the right load wouldn't work.
Similar to my thinking!
I'd choose hard-cast boolits with stout charges of powder behind them. Whether DA's or single-actions, my sidearm would have 4 to 5 1/2 inch barrels.
But how proficient are you with your piece? After putting together your woods-arm, are you going to put a couple thousand rounds through it to be come "good?"As for me? I need to get busy!