Not to start another thread, I wanted to resurrect it for some discussion.
I camp/raft with my wife a lot and like to share the same bed
We strapped the two cots together with 2 1' straps so the cots don't come together and use Paco Pads on top. It creates a small bump in the middle, but still good enough to snuggle and support both of our weight.
I found the moving pads at Harbor Freight for 3 bucks and cut them into squares to put under my cots to protect the floor of the tent. Works great!
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We have tested the double cots on two rivers now and slept like champs. So if you are like me and like to snuggle with your buddy at night, two single cots work great strapped together.