We co-slept with all three of our children.... still occassionally with our 2yo.

With the first query: My DH was the first to wake up and get up each morning but fortunately all the cupboards etc that he rummaged through were in another room to our bed. However using a night light that emits a low wattage glow rather than turning on the over head light would probably work for collecting items... maybe not actually getting dressed to... but there's the bathroom for that I guess.

Regarding noise levels: "wake-ability" seems to depend on phases, ages and temperaments. It's variable i have found. On the whole though, young children do tend to sleep more deeply than most parents. My 2yo still sleeps through a fair degree of noise, especially within the forst 20 minutes of a sleep cycle.....actually so does my 5yo! However there were times when they were younger that they were more wakeable... but it's hard to pin point exactly when and for how long... and each child would be different too. Remember that it's incredibly noisey in the womb! Newborns often find it hard to sleep because it's too quiet! Low rumbly/rhythmic noises like distant vacuuming, traffic, washing machines are typically soporific for newborns.