Hello, i am new here,i recently picked myself up a 1992 skyline nomad trailer,for me and my three fir babies.The queen size bed,in the back is too large,i cant even walk around it,is it possible for me to measure out the box,and cut it,to fit a full mattress,i know it will be be a little longer,as i can not afford,the ones they sell for campers.Right now i am in the process,of replacing the wall under the window,that has had water damage.Thanks to all who respond.