DD is almost 8 months, and we are cobedding. She usually goes to bed around 7/7:30, and we join her a few hours later. She knows how to roll but doesn't move around much while sleeping. I do use a monitor and put pillows on the edge of the bed, but she's never even come close to them. I'm thinking this will have to change when she starts crawling. One idea I had was to transition her to the crib until we are in bed/her first wakeup. I'm nervous about how this will go though. Should I start transitioning her now before she starts crawling? Or put rails on our bed?

How did/do you cosleep with a crawler or walker?