Here is what most of the responses have told me along with some
research. These ideas are based on using timber from the site. If
purchased timber is used, just buy the latest PT stuff and be sure to seal
it off.
As for the pole, species if very important. Locust and Ceder are often
mentioned as long lasting poles. From personal experience Locust fence
posts out last just about everything but Osage Orange but are much
straighter.
Chemical treatments, used motor oil, and tar were frequently
mentioned. Charing the pole was also mentioned several times. Be sure the
pole is completely air dried before use so any checks can be delt
with. One idea was to bore a hole in the base to speed drying, reduce
checks, and allow penetration of what ever preservative used.
If the ground does not drain well, don't bother with poles set in the
ground but use a form and make a cast in place concrete pier. They can be
stopped at grade and steel anchors used to secure the poles.
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