we use an air mattress on one of our beds in the trailer. I love it, as you can make it hard or soft. Single will fit perfectly on a bunk bed trailer, but you would have to measure your mattress to get the right fit for the main bed. Just check out the Cdn Tire and Wall Mart site and see if something like that might work for the interm.
looking at the Cdn Tire site, I know we have never spent over $60, we don''''t need one of the big fancy ones. The one we are using now has been in our trailer 3 years.
We will sometimes put a memory foam piece on top, or in the corners if it does not fit exact. A regular queen size mattress is 80" long.
http://www.canadiantire.ca/en/sports-rec/camping/air-beds-sleeping-accessories/air-beds-pumps.html Edited by Brenda, 2016-07-06 08:01:22