I definitely wouldn't use the pressure treated stuff. They changed the formula a couple of years ago and is really nasty now. I hate to even touch the stuff. Most of it you get now is still wet and I can't imagine how it would react when you were out in a heavy rain. Since I retired I do a lot of woodworking and I won't hardly take a job where I have to handle and cut a lot of pressure treated. Guess I'm getting old and soft. Like you said, spend a little extra and do it right.
________________________________________
A day late, a dollar short and two drinks behind.