MT,

All the tools (GPS, compass, following your map) are highly recommended in WCPP but even with all those you'll need a healthy helping of patience and, hopefully, some luck.  Finding some of those portages is a real challenge.  They're there (most of the time) but often nearly invisible.  We had three pairs of experienced eyes this last go'round and STILL got confounded frequently.  Also, as far as campsites go, ONLY trust what some other paddler has CONFIRMED actually exists.  Fully half the time the campsites shown on park supplied information did not exist.  Be prepared to clear brush & improvise campsites.

Jimbo   8-)