You pose an interesting challenge and one I think will have a different answer for those depending upon their outdoor philosophy. I was just reading Alpine climbing: Techniques to take you higher by Mark Houston & Kathey Cosley. Excellent book on mountaineering that I got for Christmas. They bring up the quote of Yvon Chouinard. ” Leave most of the ten essentials and other impedimenta behind. Remember if you take bivouac gear equipment along, you will bivouac. The authors of this book emphasize the process of situational thinking and decision-making. Basically they argue against blindly following rules and protocols. The most important piece of equipment we can take into the wilderness is our judgment. That said here is my list. Not much different then your winter backpacking list
Clothing Worn
thin hat thermal headwear for active conditions thin PowerStretch balaclava 1.5 oz
active shirt bicomponent wind shirt Rab V-Trail Top 12.0 oz
underwear Patagonia capilene top & bottom
active pants soft shell stretchwoven long pants Arc’Teryx Gamma MX 18.0 oz
gloves windproof, insulated gloves Cloudveil Icefloe Gloves 5.0 oz
snow socks ultralight thin, ski-style sock Smartwool Ultralight Ski Socks 4.0 oz
gaiters breathable gaiters Outdoor Research Flex-Tex 4.5 oz
boots insulated snow boots Baffin Tundra 48.0 oz
Other Items Worn / Carried
ski poles one piece, carbon fiber, with snow baskets Stix X1 with nordic handles & snow baskets 8.0 oz
snowshoes large deck model for deep snow Northern Lites Backcountry 30″ 43.0 oz
whistle pealess whistle on Spectra cord Fox 40 Mini Whistle, AirCore Plus lanyard 1.0 oz
watch compass / altimeter watch highgear axis 1.3 oz
Other Clothing
storm jacket integral designs event rain jacket 9.5 oz
insulating jacket synthetic high loft moonstone cirus ultralight 12.7 oz
insulating pants synthetic high loft insulating pants with side-zips Integral Designs Denali Pants 20.0 oz
warm hat wool beanie cap PossumDown Beanie 1.5 oz
Extra socks smartwool ultra light ski 4 oz
backpack ultimate direction speedemon circa 2001 22 oz
Other Essentials
maps 2.0 oz
light LED headlamp, suitable for nightime navigation Petzel tikka plus 2.75 oz
first aid minor wound care & meds assorted wound & blister care and medicines 2.0 oz
firestarting emergency firestarting – waterproof Sparklite & firestarter in 4″x7″ Aloksak 1.0 oz
sunglasses 100% UV blocking, plastic lenses/frames Julbo 1.0 oz
sunscreen 100% UV blocking, waterproof, paste Dermatone 1.0 oz
personal hygiene assorted toiletries toilet paper, alcohol hand gel, in 4″ x 7″ Aloksak 1.5 oz
small foam sit pad 2 oz
emergency blanket 3 oz
food 16 oz
water average carried 1 liter 48 oz
total wieght all items worn & carried 20.08 lbs