Ed -
Unless you have weighed your TM, I very much doubt that it weighs 3000 pounds. The dry weight is around 2850 pounds, and the air conditioner alone would bring it up to 3000, with the awning adding another 50. And this is before you have added any of your "stuff". I suggest that next time the TM is in ready-to-camp condition, you find a CAT scale (they are everywhere, and cost about $10) and weigh your rig. It's easy, takes only a minute or two.
As for parking on pressure treated wood - we'll wait to hear from tireman9, but I don't think the chemicals are good for a tire.
That said, your tires and the way you use them (pressure and speed) should ensure that you have little trouble.
Bill
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