i didnt ski a single day last year without a cast on one of my hands
i broke my hand last year, i wore thin little gloves with oven mitts over them all year with no poles.
next year im starting ove-glove- steeze
i skied pretty much all season last year with a cast, few tips:
wear an oversized mittin over it, just work on your basics and get them down on lock, work on more tech stuff instead of big stuff, dont use it to brace your fall (I broke my cast in half)
good luck with it