Haven't used one since I was a young boy scout. When we'd do long campouts, we'd bring the chuck. Of course, we never had a stove in ours, just pots, pans, utensils, and cooking basics (oil, spices, flour, sugar) and clean up stuff (soap, scrubbers). From what I remember, our opening flopped down and had metal cable that tied it to the top of the box and made it a working surface. It also had some kind of stand (when setup) and rope handles on the side to carry (lug) it to the camp site.
If you make the "door" a working surface, I'd think having one of the rollable cutting mats would be useful.