foundation question for building a small cabin
I am planning to build a small cabin as a weekend type getaway place. Nothing fancy maybe 800 to 900 square feet or so. I plan on a pier and beam type foundation.
My question is if I dig down to solid rock (which will not be more than about a foot in this area) and I set a 6x6 treated lumber post for my piers, should I put them in concrete, or just pack them with the dirt to fill? Not sure if concrete will incourage rot any more or less than just native soil packed around them.