Having never RVd before until last yr with the truck camper (which is sold now btw) didn't really know what to expect but stuff doesn't really move around much. It has been a non issue 98% of the time except maybe after a bad stretch of frost heaves or things getting a little crazy off road, everything stays put in the cupboards or on the counter. Couple times the counter stuff,coffee pot etc has been tossed around but it's rare and you can guess when it has happened by the oh c r a p moment in the cab!
Cases of beer or soda are the biggest culprits. They get bounced around and the boxes break but there's not much storage in the TC for bulk drinks so they end up riding in the open until chilled and transferred into another container, like my belly!