OK, guys, at the end of a long day, and against my better judgment, I'll jump in here with my two and one-half cents.
I usually carry only one gun -- strong side, front pocket. I know, I know . . . but in the best of all worlds it would be different, and on weekends it is different. I have thought about that situation in which the strong-side hand is disabled. The best solution I have devised is to attempt a "crippled" draw with the strong-side hand and then to attempt to execute what used to be called a "border shift" to the weak-side hand. All of that, of course, argues for running a mag or two through with the weak hand whenever practicing at the range.
With that, I have nothing much additional to offer this late at night.
RS