Hey there, Ian —
Congrats on getting the GA gig. I think you’ll enjoy it.
While it is always nice to use your own equipment, skis are a pain to travel with, especially internationally. The recreation department at McMurdo oversees Gear Issue. They have a wide variety of skis, boots, and poles for anyone to use. Free of charge, of course.
Never been XC at MCM, but like Mike said, plan on packed snow and/or ice. It ain’t like skiing in the Rockies!
Take care, and I’ll see you in August.