I mentioned before that we've been "sort-of" co-sleeping with Elizabeth. This arrangement worked really, really well for us, but the more mobile Elizabeth becomes, the less well it worked.
There are many testimonials online and elsewhere about the benefits of extended planned co-sleeping, but strangely few people talk about co-sleeping with a baby that no longer stays where she was put! I broke my collarbone falling out of bed as a toddler and don't really want Elizabeth to risk the same, so I asked around to find out how other co-sleeping moms handled naps etc.
I heard about three main strategies:
We tried a modified version of option 1 for a while, substituting heavy laundry baskets as an Elizabeth trap to prevent her from being able to crawl out of bed. However, once Elizabeth started pulling herself up on the bars of the crib, we knew that it was time to lower the mattress so that she can't escape over the bars. There's a family history here too - Auntie Janice used to routinely somersault her way out of her crib as a baby (landing on my head!) We'd rather Elizabeth didn't try that since we think she'd find the floor a rather uncomfortable landing spot.
Our solution at this point has been to keep the crib strapped to our bed but to lower the mattress down so that she can't escape, creating a sort of trundle bed. The pictures demonstrate how the bed is attached. This continues to give us easy access to her while keeping her safe but even this won't work for too much longer...