I'd love to go to Antarctica.

However... skimming through some of those, they actually look like pretty typical "work on a team" positions (e.g. "...technical guidance and mentoring of Computer Technicians with focus on accurate completion of work orders and execution of standard operating procedures..."), not "this cupboard has spares, this cupboard has rations, see you in 6 months, good luck!".

Any hints for finding something that's closer to the second option?

Not IT-wise, but there are still a few fire lookout/lighthouses that are manned. Look for jobs to maintain stuff like that. Rural electrical, microwave tower, pump station, pipeline survey, earthquake sensors, road snow plowing. Anywhere there are long stretches of infrastructure and low population. Live in a trailer.

Trucking industry is doing well for mobile loners.

Land surveyors in places like Alaska spend a lot of time with just their backpack, equipment and rifle. I think there are still jobs for population surveys, like counting penguins/birds.

Leidos would be another company that does Antartica, satellite grounstation stuff.

Thanks! Lighthouses all automated around here, but some of the others sound interesting...