8:14 a.m. on September 16, 2010 (EDT)
Welcome to Trailspace, AlpineAmbition/Donny.
This is an interesting thread. Here are my 2 cents.
For background, in winter I:
ski (ungroomed trails cross-country, and recently started some backcountry/AT skiing here in New England),
hike, run, snowshoe on trails
climb New England peaks (like Mount Washington)
climb ice (far less occasionally, though I used to regularly before kids)
I've also done a little climbing on glaciated peaks, with plans to do more (just did Rainier, have also done a little climbing in Canadian Rockies).
How I learn:
About 10 years ago progressed from lots of hiking and backpacking to wanting to do more peaks in winter safely (we were already cross-country and downhill skiing, hiking, and snowshoeing in winter). So my husband and I took an intro winter mountaineering course from a guide we knew in New Hampshire.
Ended up getting hooked on ice climbing and did a bunch of that for a while together, with a few guided climbs from this guide to learn skills (he'd say, we were bad clients because we hired him to learn and move on... ha ha). Have covered winter travel, ice climbing, glacier travel, and so on.
We've both also taken intro avalanche courses. Mine was last winter. I expect we'll take the more advanced classes within a few winters.
In addition to learning from a few guides and classes (like Wilderness First Aid), we also read a lot, listen to more experienced people a lot (like lots of folks on this site), and try to keep on learning.
I know I'm not the most experienced person out there by far, but I think I've got a good grounding and most importantly, know how much I don't know yet.
Gear:
You guys have already hashed this out pretty well, but here are my thoughts. In addition to brain, clothes, first aid, map/compass, appropriate climbing and/or camping gear, sunscreen, sunglasses/goggles, emergency shelter, emergency/survival gear (I have a stuff sack I always carry), and so on... for winter I carry:
A beacon, shovel, and probe (for backcountry skiing and climbing)
Avalung: I got one as a gift last winter from my spouse and will use it if skiing in avalanche terrain.
Traction devices: I have everything from Microspikes to 14-point Grivel ice climbing crampons, and a few others in between, depending on activity and terrain.
Snowshoes: Got a variety of these too. My MSR Lightning Ascents are my favorites.
Trekking Poles: with snow baskets and a whippet on one.
Ice axe: though not on every outing
Ice tools: obviously, if ice climbing
Food and water: Yeah, that's obvious. But I always bring extra food and water. It's a mental thing for me too. I like to feel prepared.
Extras: I usually bring extra gloves, socks, and maybe a hat and/or balaclava (or for layering). I'm warm when moving, but I can get cold if I have to stop for longer periods, especially in my hands.
I've never regretted bringing extra clothing/insulation. If in doubt, I always go with warmer layers. I don't overdo it or let myself get sweaty though.
Stuff I don't carry:
GPS/SPOT/Sat Phone: I don't know if this is surprising or not, but I don't have or use any of these. Well, technically I own a GPS and sometimes my spouse uses it, but it's not something I use regularly much, though I'm not opposed to using it more.
I might consider a SPOT or PLB, but there would have to be a really good reason and/or trip I thought it was necessary and useful for.
Portable Rescue Sled: I do not have one, but can imagine getting one for bigger skis and climbs if I wasn't pulling a pulk.
Airbag system: I got to try these out at last winter's OR, but I don't have one and probably never will.
I'm sure I forget something above, but that's what comes to mind right now. We do have spreadsheet checklists for person, group, activity. I use them to make sure nothing is forgotten and keep it simple.
My husband takes them several steps further with weights down to the ounces (mainly because we do a lot of three-season stuff with two little kids in tow).
Thanks for starting this thread, Donny. Winter is probably my favorite season.