The Zipperlip is easy to find. First, head north by southwest on the two lane highway. At the campground, take a left. Turn right after a few miles, it's approximately the 223rd douglas fir tree that marks the spot. Head off into the woods. Look for which side of the tree the moss is growing on. It helps to walk in circles around the tree a few times. The fishermen in the know have left branches and leaves on the ground to mark the secret trail. Anywhere you see them, walk that way.
When you get to the river, the best holes are generally upstream. Go that way, and keep walking. I generally hook my fish in the river, preferably near a rock.
E-mail me if you need anything else.
By the way, these directions work on Puget Sound, the Peninsula, and sometimes in Oregon, if it's summertime. For winter Oregon fishing on the Zipperlip, change the directions so that they are opposite of the above, but still go upstream and fish behind the rocks rather than in front of them.
Good Luck.