Mrs. F - according to the Farewell I DVD and tour book credits, the band does employ a chiropractor or massage therapist to accompany them on the road. IIRC, Don has had a chiropractor work with him since he began having back problems in the 70's.
Brooke, I agree with you that it would be sad to see Don have to give up drumming completely, but for me,I would still want the band to continue even if it did come to that.