We have a 14 ft expanda which we are seriously thinking of up grading just due to the fact we cannot get comfortable in it. We have 2 kids. Just got an annex to help for extra space. I just find the beds so uncomfortable in this van! Has anyone had a similar problem? I have put on our bed a woolen underlay and a mattress topper which has done nothing! are the mattresses the same in bigger model expandas? I know this has been brought up before but fresh ideas and advice would be great tia