haven't camped on a mountain yet, but did went camping for 4 days in about 2ft of snow...
we arrived around 21h, it was already dark; we walked an hour, we had a very large and sturdy tarp, we put all our gear in the tarp, folded it into one big pack, then we pulled the tarp with our gear towards the campspot.
Arrived at the campspot around 22h, took out our shovels and built an igloo !
yes, a frikkin igloo!
took us +-3hours, then we took small branches from pinetrees and draped them all over the ground in the igloo, then we put our tarp on the ground, over the banches for insulation and protection against melting water.
We all had sleeping bags and bivak bags. first we dried our cloths over a campfire, then we took them with us inside, cloths and necessary equipment such as water and gas-bottles we would stuff in the bivvy bag so they wouldn't freeze.
It snowed a shitload that night + lots of wind so i just plugged in my ipod and fell asleep to some sweet music.
next morning, we woke up to the sound of a fox scavenging around our fireplace, shooed it away and prepared for breakfast; the little liquid water we had was not enough so we first had to light a decent fire to melt snow.
Went in the woods, chopped down 3 pinetrees and started our fire with a candle, some treebark and resin from the trees.
About 2h later we had a pot on the fire for melting snow; you wont believe how much effort you need to put into melting 1 bottle of water; a full pot of snow was maybe half a glass of water....
then 2 people stayed near the campsite to keep the fire burning and melt water.
in the meanwhile i went to the village with a friend of mine; it was a 2 hour walk through the forest; no roads, just compass and a map :) In the village we got ourselve some potatoes, some spices, vegetables and meat, lots of meat :)
hiked 2 hours back to the campsite, prepared the food, it was the best meal i ever had! (because i was so hungry) :D
Long story short, we lived like that for 4 days, only then you realize how easy life is; you just open a fridge and have all your food there; you want to go sleep, you just crawl into your bed and you'll have fresh, warm cloths in the morning, etc etc....
i could definately advice doing this, but be prepared for it, especially mentally, its just in your head, you gotta keep going and forget about the cold :)