Dang Tim! I'm really sorry to hear that! I forgot just how bad the poison oak is in our neck of the woods. I haven't been affected in years! I learned when I was fighting brush fires here a trick that seems to work for not getting the rash: eat a new and VERY small leaf of it early in the spring - you don't have to chew it, just swallow. It somehow creates an immunity. If you're REALLY sesitive you can get the same in pill form now.
As for curing the itch I've heard of a few things too, like a paste made from the leaves of the Manzanita tree applied to the rash dries it up... My favorite thing to do with the nasty oak rash (and this feels surprisingly good, almost too good) is to take it under as hot a water as you can stand, let is soak. Once you think it might be burning (did I mention this feels good... sounds crazy, but you'll see what I mean)the scrub with soap followed by cold water, as cold as you can stand it. This will help clear the poison oak.
Remeber, all of your gear and the clothes you wore in the woods are contaminated and need to be washed in a separate load from your other laundry with warm water and a good detergent. Don't skip a thread.
If you think it was bad in the spring you should see it in the fall! Whew!