In 1955 I hiked from Stevens Pass to Snoqualmie Pass in Washington with my left forearm in a plaster cast. As I recall, the trip took about a week because we were climbing a few peaks enroute. It definitely made life more difficult but I did have the (clumsy) use of my left fingers. I tried, unsuccessfully, to keep the cast dry so it got sort of soft in places as the trip progressed. At that time I was only a week or so from having the cast removed so didn't think there might be a significant downside to what I did. I still got chewed out by the doctor when I went in to have the cast removed. Not for the last time. smile
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May I walk in beauty.