S.B.
I co slept with all three of my daughters, until around their 1st birthday. I used a bassinette next to the bed all three times. This way, if you find it is a little too hot, you can always put the baby back, yet have your hand there to soothe her. I was always at arms reach that way, especially when all the baby needed was a soothing hand to go back to sleep. With having a/c, even just in the bedroom, I never found that it was too hot to have the baby in bed with me.
Good luck & happy co-sleeping!
S.
PS. I loved your PS. :-)