I hate moisture problems...
The plastic on the sub floor will cause many issues with the vapor transfer getting stuck, so to speak.
You need the plastic is where it will condense under the floor joists. It is best on the floor of the crawlspace and run up the walls to just below the sill plate. Then secured to the concrete wall at that spot with a flange of sorts. Basically check out your masonry supply stores for a sealing flange, usually a metal piece with rubber gasket which basically seals the moisture under the plastic envelope.
The professionals use 6 mil poly, the 4 mill punctures to easily when you move across it later.
The basics are the wood and anything cellulose based belong in the heated and controlled part of the house, above the plastic. The rest stays outside the plastic.
I hope this makes some sense, you can always go to www.buildingscience.com
for the really long explanations under "crawlspaces"...or follow my basics.
Good luck under the house....I dislike crawlspaces too.
PS..please where your respirator....it's worse than you think under there.