What a big boy!!
My 7 month old sleeps in her cot to start with and then I bring her into bed during the night when she wants to feed (yes she still night feeds, and yes I wish it would stop).
We are coming up to winter now so I guess I'll deal with these problems soon, but I just make sure she's got enough clothes on and she sleeps with a blanket, but it's a really light blanket and very airy so I doubt she could get herself into much trouble with that. She is old enough now that she pulls away from my pillow/shoulder to get air when she isn't getting enough.
I would try one of those blanket sleeper things. In Aus, I've seen them for size 1. Best of luck!