We are planning to travel overseas with our baby when she's 4-5 months old. I'm wondering whether we need to get a travel cot for her (one of those very lightweight ones that pops up like a tent, obviously), or whether there is another solution to where she can safely sleep.

At 4 months she'll be rolling, presumably, and possibly able to sit up on her own. So it needs to be something that is safe with a more moble baby than a newborn. I'm concerned about the potential for a suffocation risk with travel cots in general, and with the risk that she might be able to tip it over if she rolls into the side of it. Maybe that's not a problem? I don't know.

Any suggestions? What have you tried and how did it work for you?

Currently DD sleeps in her sleeping bag in a "co sleeper" cot by my side of the bed. I'd certainly consider sleeping with her while we travel if I thought we could do it safely, but it would have to be a pretty big bed to fit all 3 of us, and not sure whether that's possible to ensure. (DH is tall, and he and I don't fit so well into a double bed - it has to be at least queen sized, for comfort.)