We found this collapsible storage box at a local home improvement center.
It comes apart and snaps back together into a package just the size of the top.
We put the road cover off the Combi, another tarp, coffee maker, extra drinks, small gas grill and other supplies inside. And you can sit on it or use it as a make-shift table.
When I get up in the mornings, I can make some coffee, have a bite and not disturb the wifey's beauty sleep.
The only downside is, if the top has water on it (after a rain) it will run down inside the box when you open it.
Just remember to wipe off the water and the contents stay dry.
Fits perfectly on top of the camper for travel.
We also have some square plastic buckets (kitty litter came in these) with snap-on lids for dry storage and fit on top under the road cover as well.
Happy Combi-Camping!