I went ahead and pulled the oil return line off the upper pan and closed off the pan copnnection with a little hose and some clamps.
I then plugged the bottom of the oil seperator and reconnected everything back up like it normally runs i.e. breather into seperator etc...
I then hit the hills. Two trips up the toughest climb I could find and guess what... NO oil leak!
Now to find out why the oil is getting pulled/pushed up the drain line.
I went ahead and ordered a new check valve and "clamping sleeve", the dealer has no clue what it is for but it is in the same picture so may as well get it. 22 dollars for both parts but if it fixes this leak permanently it will be the best 22 dollars I have ever spent on my cars. They of course have nothing in stock so it'll be next week before I can even think about trying to replace that part. In the meantime though it is such a relief to drive the car knowing that if I park it on a nice driveway I won't leave a stain...
BTW - I did pull the top off the seperator since I have it plugged to see what kind of blowby oil I was accumulating in there and it had maybe 5 or 6 drops of oil. Just enough to cover the bottom of the seperator. Man, what a relief to also know now that not only is my turbo okay but it appears that I am not blowing any large quantities of oil out the breather either.
I'll try to get to that check valve next week if the warm weather holds.
Thanks to all for listening to me and providing input as I try to think this thing through.