So Bob, are you happy to take full responsibility for Drew and other inexperienced peoples safety on such an event? I know I'm not.
A beginners course in Lappland, away from the village, main outline (his is how we did it the last time I was apart of the team that taught such a course).
Communications: the ability to reach an outside contact at any time, day or night
Transport: having a snowmobile, experienced driver and a sled availble. Either on site, or on call. (e.g. if Billy is hypothermic you bung him in the sled and take him to a hospital, same for any of a number of other serious accidents).
Minimum equipment list. And check that people actually bring the stuff they have been told to bring (e.g. a "winter bag" very nominally rated -15 C is not sufficient...).
Instructors bring some spares on the kit front...
A few days (1-3) of training before you do the field portion. Ski training, theory on hypothermia and frostbite, etc
Somewhere to go "hide" if it turns nasty. When we run the winter basic course we do not go out overnight if it is colder then -25 C. Simply not great a risk of injury. There are cabins and kaatas in lots of places, and while a dozen in one of them might not be nice, it is preferable to risking ones life.
We were fortunate not to face extreme conditions on the Arctic course that has just run. There I would agree with the statement made above but had the conditions been -30°C or colder, like the temperatures faced at this years Jokkmokk Market things could have been very different. One does not have to use it, just have it in case it is actually needed.
I'm afraid I think attendance of a professionally run course or similar experience such as military training, should be a minimum requirement for people joining this project.
I agree. Either one runs it as an advanced course, or a a basic course with all the extras that that entails. And even an advanced course should have a safety net: in -35 C it is quite easy to die within hours.
In this case my suggestion is a static camp, not *too* far from road or house (5-10 km?), with at least one heated shelter (tent/kaata/hut) available, a clear set of rules (prior experience, minimum equipment checklist, etc), and some thought to emergencies. Then people could day-trip or play with crafts/skills (making roycraft snowshoes, build quinchies, ice fishing, etc) or do day-trips (etc) away from that camp. We could do it with travel, and new camps every(?) night, that is not cast in concrete, but I think a base camp would be the option with widest appeal (pulling a fully loaded sled can be brutally hard work in deep snow and hilly terrain).