Persephone - to add to what Winter has said, you can always try things, and if one AP technique work for you but another doesn't, then that's fine too.

I babywear (toddlerwear now) and follow other AP principles but never co-slept. I loved the idea in theory but DS is a noisy, kicky little bed hog who likes his space. . We all sleep better when he is in his own bed, and being well rested (or less tired, anyway) gives us the energy to devote to him in other ways, which we couldn't do if we dogmatically adhered to the idea that co-sleeping is an essential part of AP, even though it doesn't work for us.

The nice thing about AP is that it is more of a philosophy than hard and fast rules - I know many AP parents, all of whom do some things slightly differently according to what works for them and the specific needs of their child.