Has anyone any experiences of co-sleeping on airbed while camping?
I took ds camping at the weekend and ended up getting him onto the airbed with me as it was so cold.
We are taking him to cambridge folk festival next month and I want to plan ahead for potential co-sleeping. He was fine on the airbed but I didn't sleep much for keeping one eye open 
any advice? I've looked up the thermarest but they are so expensive and I'm not sure if they'd be big enough for me, dp and ds? also are they as comfy and warm as an airbed?
Ds will be 11 months when we go btw.
Thanks in advance! :)