RE: never hunted up north
Your best bet in the Pittsburgh area is to knock on doors on the farms around the area. I live about 1/2 north of the 'burgh, and get some action on small farm ponds in the area. Not nearly as many as you'd find up around Pymy or Erie, but usually see some. Although, on smaller water it's often hit or miss. Wednesday morning had ducks and geese flying pretty much all morning. Saw only one small flock of geese today.
I've never hunted it, but Lake Arthur is supposed to be pretty decent too.