Hurricane country doesn't like to see post on top. You can but then have to use those ugly top buckets. We mostly notch and through bolt.Here in Toronto a footing has to be 48" below grade, with a sono tube at least 2' down. The concrete and sono has to be 6" above grade and a steel saddle has to be set into the concrete. The post is not supposed to be in contact with the ground at all.
I will also dispute attaching a beam to the side of a post. It should be doubled up, and put on top of a post to provide the most strength.
Just my 2cents. (oops: we no longer use pennies here in Canada!)