I see them!  They are -WAY- back there!  :)

This was supposed to be a woodshop.  Until I had to empty another storage unit I had so that I could rent it out for a friend's stuff.  I thought it would be temporary so I just "threw" everything in here.  I was wrong.  :(

The other 3 popups are in this one.

The Royal is in the back corner.  You can barely see it.  The oldest one is right here in front, it is a 1971 Yuma, a previous owner had trouble getting it to close and slightly bent the lift tubes.  <sigh>.  The one that is "up" is the 1974 Hawk.  Last year it wouldn't close so we tied it closed as far as it would easily go and brought it home, then set it up.  I am supposed to work on it.  There was room before I got the Yuma.

Don't know how yours look, but this is how the Hawk's seat area looks.  None of mine have the couch/Gaucho seat so I don't have a measurement for that.  I would think that the seat depth and seat back height would be the same as the dinette, only the length being different.

Here it is with the cushions in place.  The seat back is 16.5 inches high by 39 inches wide and aproximately 3 inches thick.  Heavy fabric on the face and all 4 sides, vinyl on the back.  The Seat part is 22 inches deep by 39.5 inches wide and approximately 3 inches thick.  Also heavy fabric on face and sides with Vinyl on the back.

In case you were interested... this is what the entire end looks like, without the table.

Hope this helps.