Thanks for all the replies.

I have tried the single airbeds, they are really really comfy, but unfortunately I am two for two on leaking airbeds so far, so I don't have too much faith in them. If one sprung a leak at the start of a camping trip it would put quite a damper on the rest of it.

Looks like I may have to order one of the camp beds from the states, that or work out another solution.