Not sure how big they are but would definately recoimmend a Coleman Double Comfort Bed, it has 2 chambers toi blow up which is added comfort to both who are sleeping on the bed and we found that it didnt go down as easy as some of the other airbeds we have had before!!!
Coleman Double Comfort double (best double airbed on the market IMHO) is 137 cm wide according to their website. Bet you could squeeze two into a 270cm wide inner. The Cadiz (I`ve got a 5+2) is pretty generous with the gap betwixt inner and outer and the Coleman has a slightly squishy edge at the point where the main chamber loops round the second one.
But the best use of limited space would be if you used self-inflating mats. I don`t get on well with them, but kids don`t seem to have the same problems with old creaky bones that we do. So what we do is have a double airbed for us and two mats for the kids.
A day of all things motorhome and campervan. The show is held both in the main indoor arena and across the grounds. Catering, hot drinks and food options are available. Easy access to the site and free parking included. Win one of five pairs of day tickets