Lori,
I carry far fewer individual items than I used to think was necesary. Most of my gear is 15 to 30 years old, and its the same stuff that I've used over that time, I just take less and less of it. Its not difficult for me to go out on skis with an overnight pack and breakfast with a 25 pound pack plus my ski clothes - meaning the light under layer, boots etc, with the warm stuff in my pack. One of the ways that I achieve light weight is by extremely expensive SPECIALISED gear that I've bought over time, like my REI 32 ounce goretex down bibs with full zips and built in gaiters [ fully seam sealed], a discontinued Marmot 40 ounce goretex expedition coat and a Bibler tent. Cram it into a huge light spectra pack without any stuffsacks along with my WM winter bag - goretex and seam sealed of course. The point is - specialised gear is expensive but far lighter than layering or doubling up gear not designed for winter ski camping. Layering is HEAVY. The lightest garment is two thin pieces of nylon with feathers between them.

I've stepped out of my tent in minus 5 F and 50 mph wind gusts [-60 windchill] and sat in blowing snow wearing my long underwear, gloves, goretex bibs and goretex exped coat and been toasty warm for about 20 minutes while I melted snow and made breakfast. But then thats another story...

Otto
Thank you very much for that Otto. Coming from you, that advice is pretty golden. I'll look into the eped mat. I told my wife I need a replacement for my Warmlight for Christmas. Otto I guess you approve of the valve and filling procedure for the airmattress? And its not required to inflate it all the way, so you are not lifted 4 inches - try partially inflating it so you sort of float in it rather than being suspended above it. I found my DAM more cuddly this way. As I say I use the fanfold mattress under it so if my hips do push through the airmattress, they still have insulation.
Jim