PT wood is nasty stuff, wear gloves always, and it is nasty stuff and will give cancer if you live long enough and it will off-gas so you breath the nasty.
Well,I am 71 years old alive and well with no signs of cancer yet!
Like G-Dog,I have worked with and handled treated lumber for years..I used to pull green chain for a N Idaho mill that dealt with mining timbers for the mines up there..They used pressure treated timbers in the mines for obvious reasons..I have never heard of anyone of the miners getting cancer or anything else related to the treated timbers..
We used to use the culls for everything you could think of around the house because they were...Free..LOL
As to the op and his question,I would just set the camper on some wood strips,I used 2X4's on one TC that had bed rails for a fifth wheel hitch in the bed..I am thinking of doing the same for my currant TC as the horse mat, is a total pain to work with and store off the truck..
