We have a 13' SCAMP, basic floor plan.  There is some space behind the back of the front couch.  We store our foam there: totally out of the way; otherwise unusable space; not using up good closet/storage/shelf space.  We also use two large pillow covers (bright red, matching the theme color of our SCAMP) into which--alongside the pillow, we stuff a sheet or two and blanket for each bed (front and rear).  These are left out and used like couch pillows during the day.

When camping alone in our Scamp 13 standard big bed I do not use any pad on the bed. Only a sheet in a sleeping bag. The sheet, sleeping bag, and a pillow store nicely on the bed extension which is placed under the table against the back of the Scamp. Just as "Scamper Camper" does.

When camping with my wife we use a 4" foam pad on the bed and leave the bed setup all the time. In our Scamp we sit either on the bed or on the front bunk to eat, read, etc. If we need/want to sit at a table we can sit outside at a small folding table we carry (we have an awing) or at a picnic table that most camp sites have. We feel it is important to keep things simple.