DD is 4 weeks and we co-sleep. We bought an Arm's Reach before she was born but she won't sleep in it; however, because it's attached to our bed I know she can't roll out (she sleeps between me and the Arm's Reach).
We have a few trips coming up, the first of which when she'll be 2.5 months. It's possible that she'll have magically taken to sleeping in her own space by then but I'm not counting on it :)
So I was just wondering how you make hotel beds etc safe for co-sleeping when you travel? At home I know she can't wriggle out because the AR is there, but obviously wouldn't have that reassurance on the road... (I wouldn't feel happy putting her between me and DH because he's a very deep sleeper)