From the mail of steverod:
| Lassen | Yosemite | |
|---|---|---|
| Forecast | here | Yosemite |
| Snow Conditions | (530) 335-7029 (530) 595-4444 |
(209) 372-1000 |
It is a one night trip and will involve carrying packs/tents. If you don't know what top bring realize that when you are walking through the day you are going to have no problems being warm. You will be working so hard you are going to get hot and sweaty. So the idea is to stay dry, and keep the wind off you without melting.
When you make camp and stop moving around is when staying warm gets hard. At night the wind gets worse and the temperature is going to drop. Then thick heavy clothes come out.
So you need to have flexible outfits. Don't bring that ultra heavy winter parka. Instead bring a goretex jacket to break the wind, a tshirt, and a heavy fleece that is easy to remove. All personal equipment you need to know about is on the Equipment Checklist.
You can purchase most of this stuff from REI and Western Mountaineering. Western has a snow camping rental deal. It includes crampons, poles, snow shoes and boots for something around 40 bucks. It is the way to go. Communal Equipment