4salt, the object of a bed liner with a camper is too have it "not" slide. I have a linex in my current truck and before that it was Rhino lined. I plan on buying a rubber mat to place under the camper on top of the bedliner to prevent the sliding of my camper. I have read some RV forums and they all recommend this.

Dave some airbags are recommended also, but not necessary if you have the overloads.
The list goes on and on when adding accesories to our trucks doesn't it.

Steve