Glad to hear you enjoyed WCPP. A new map should be out for next year and that would have saved you some frustrations. The Haven to Gulch portage was moved since the map was published. The same for the Leano exit portage. The park can E-mail a sheet with changes until the new map is out.
By your ongoing people tally I assume you are seeking more solitude. Check out the area between the Gammon and Bloodvein rivers. The new Irvine Loop canoe route will be on the new map. One friend that has been on six trips of one week each has only run into one other canoe party up there.
new info and portage changes here:
WCPP info