I did this on the booth in my Sunstar. On the aisle end of the front, I carefully cut out a large rectangular hole in the endcap, and faced the raw particle board edges with ripped to fit birch strips.
Then, I made a drop-down cabinet door and shaped the edges to match the other cabinet doors. The door and strips were stained with a match for Winnebago Forest Cherry I mixed up from 2 Varathane stains, and sprayed with clear matte enamel.
I sized the door to fit white laundry bags from Amazon, One is held inside the opening for use with turn buttons and eyelets. There's room under there for a full bag at the back, and one being used at the front.
Because of the propane detector under the rear one, I could only fit a custom drawer I made, which I use as canned food storage.
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