Survival kits can be really objective when you talk to people who did get stuck out for the night. Hindsight is not only 20-20 but opinions fade quickly.
Most recently was a group of snowmobilers, up top from my place on Mt Lucille.
Yesterday or the day before.
Very popular location, some groomed tracks and about 3' new snow over a 20' base since yesterday while it was pissing rain in the village down below at my house.
Clouds and snow suddenly rolled in. Zero visibility.= you don't move to stupidly drive over a cliff or out onto a cornice. A compass can encourage stupidity.
5 minutes and you are screwed.
Carrying avalanche shovel kits as everyone must, they dug a huge hole under some spruce to get comfy and wait it out until morning if they had to.
Of course, everybody has a First Aid kit on the sled, with tools and simple spare sled parts. Obviously as sled-heads, they are dressed to stay out all day long.
They had a bow saw kit. Assembled, they cut all kinds of fire wood for warmth.
Lots of fire, no big deal at all.
S&R was able to follow the pattern of their sled tracks and find them in the morning when the cloud cover lifted.
What about the night out? Just 2 things.
1. Some way to melt snow and add flavoring for lots of drink. (Over time, snow melt is distilled water and you pee until you are too weak to move). Jell-O is good for a hot drink. Black cherry, please.
2. Lots and lots of high calorie nibbly foods. Sliced sausages, Nuts & Berries trail mix. Chocolate bars. Nutrition is nonsense in the short term. Charcutier in a snow bank.
I'm out maybe 20 days each autumn in a 4x4 454 GMC Suburban. I'm ready for more than a night out. Just a cardboard box with all the food and treat stuff.
Two bow saws live in the Burb for wind-thrown blowdowns on the roads.
Two x 5 gal water cans. Every night back in the house so they can't freeze .
Many has been the day when I drive 30-60km in the bush on logging roads and never see another soul.