I expect that I will have to get up at night with them until I am comfortable with them getting up and walking around the house in the dark by themselves! In other words I don't ever expect them to sleep through the night. Most nights I get up to get a drink, go pee, grab some crackers, see what the moon looks like.... whatever.
My boys are 1 1/2 and 3 and most nights they get up 2-4 times for the youngest and 1-2 times for the oldest. As they get older they need less of me- I almost always have to move to ds#2 who just lays there and says "mama nurse" until I get to him, but ds#1 often I am only wakened because he has crawled in bed next to me and wants my hair. As they get older they also are better at going back to sleep. Like with ds#1 we can get up go to the lighted bathroom or get a drink of water and go back to bed and have a very short nurse (really less then 15 sec) and he will lay there and go to sleep. If I took ds#2 into a lighted room it would take 30 min to get him back to sleep or even just back to bed, but I am sure as he gets older he will need less of me too.
We haven't really done any sleep methods, rolling over and nursing every time they get up is just the easiest for me. I am sure they won't be getting up to nurse in 5 years. I also think that somewhere around 2 1/2 is when the oldest did start sleeping better or at least going back to sleep easily.