Gib, I would keep the post above ground and dry.

The quick and easy method for post attachment I use is:

1. Pour footing with above ground pier.
2. Bore post on center axis and embed with epoxy, 3/4 stainless all-thread.
3. Fab a p.t. wood base and clad with copper. Mount base to post, allow all-thread to extend 8 inches.
4. Bore pier on center line grid and embed rod with epoxy.

The copper has two roles, stop wicking and inhibit fungi.