I agree Anniemac.
While we never 'officially' co slept, we have done quite a bit of co-sleeping. When dd was very tiny we went to bed at the same time anyway, as she just slept on one of us during the evening, and she fed a lot in the evenings when very small - but I wasn't bothered by her being around all the time - I know some people feel insane until they get some time alone. I didn't start a bed time routine until dd was about 4 months old.
Then, like Anniemac, she would start off in her cot, and end up in bed later, though not necessarily every night, it would just depend how the night went - I would often fall asleep feeding her, and just wake up for the next feed, either with her asleep beside me, or still in my arms if I had sat up to feed her! I have to say though, getting her to sleep in her cot at the start of the night could take a very, very long time...
She's 3 now, and about 50% of the time sleeps through in her bed, otherwise just climbs in to our bed at some point, normally after about 3.30am - and we don't mind. Often don't often notice. And it's rather nice all waking up together.
Don't know how it will go this time. Imagine bed time routine may kick in earlier/easier as I'll be doing dd's routine anway, but, as anniemac says, I've got no firm plan, other than to see what feels right at the time.