Regarding cupbords and refrigerator/freezer doors... Make sure they are firmly latched and consider a retainer strap of some kind for the fridge/freezer.
On my rig I ran a cargo strap from a cupbord door (Washer/dryer cabinet only I did not have those so it was the pantry) across the front of the fridge to insure it stayed closed.
Doors either got hook & Eye locks or tied closed or for a couple cupboard I used hinges. Took the pin out and put em on the moving edge of the door. Pinned those doors stayed CLOSED no question about it.