Rev,
Not speaking for the old guys, but from personal experience, you would be surprised what you can get used to. If you are a lover of Vitamin N, and have been away for a few days, even the old dried out tobacco can be very nice. I personally carry tobacco in plug or twist form. While very strong, plug, twists and flake, usually stays somewhat moist while maintaining their true, unspoilt, straight tobacco taste. To me, a good smoke, is often very relaxing after a long day in the woods. And...if you need tobacco, after a few days, almost anything with nicotine will do. This coming from a snuff dipper from an early age.
Jeff