A number of years ago we invested in two self inflating matresses as we had a sleep over at a friends and had a great night sleep on theirs.
They cost over a hundred dollars each, but well worth it.
This appears to be the current version of the mats we purchase.http://www.campingworld.com.au/products ... /index.htm
Off-road 4WD Mats
Serious comfort with soft velour. Multiple valves provide ease of inflation and deflation. Storage is enhanced by twin compression straps plus a carry bag. Model Dimensions (cm) Valves
Click Image to enlarge
Single 195 x 80 x 10 2
Double 195 x 127 x 10 4
Queen 195 x150 x 10 4
The plug on ours broke years ago but really has made no effect.
They do take up a bit of room when rolled up.
Good luck, a good nights sleep is well worth the money invested.