I haven't seen this mentioned before so i thought to mention it here. I was mostly thinking of the "Minn. cold butt folks" but anyone interested in bushcraft and lives in the Wisconsin/ Minnesota area might be interested. This info came from the Winter Symposium folks in a video they put on Winter Trekking.com. Mors Kochanski will be doing a one week workshop/immersion the week before next years symposium which is in October 2011. Seems like there will only be room for a couple of dozen folks so if its something you would really like to take advantage of you might want to contact the folks at http://www.wintercampingsymposium.com/
and check it out. For those who don't know it Mors Kochanski is one of the masters of bushcraft.

cheers
bill