PD & DD,
I did a 3 week trip into Wabakimi last summer (August 11 - September 1.)  The park is a place of extraordinary beauty.  Being that it is boreal forest it is quite different from Quetico.  The fishing, for me at least, was phenomenal.  It is wally heaven but, as PD pointed out, too far north for smallies.  In the first 19 days we were out we saw a grand total of 2 other canoes neither of which were close enough to actually talk to.  That being said, the park is infested with fishing lodges.  In fact, in some ways the park is more geared towards fly-in fishing than canoe tripping.  In that regard I found the park very disappointing.  I really don't want to paddle for days only to find myself surrounded by the buzz of motor boars hauling fishermen around looking for the perfect place to drop their line.  I have to say, however, that because of the forest fires last summer, our trip had to be rerouted from the northern portion of the park to the southern - we went from Allan Water Bridge up through Brennan and Lower Wabakimi to Smoothrock and out through Little Caribou - so it might be that in the northern portions of the park there are less lodges and therefore less power boat traffic.  Still, I found it a long way to go only to feel like I was in Muskoka - okay I'm exaggerating a bit.  This year we're trying WCPP (August 9 - 31) which I'm hoping has all the beauty and low canoe traffic of Wabakimi without the lodge traffic.  Harlan tells me that the lodges, such as they are in WCPP, are located north of the Bloodvein so I'm expecting we'll be clear of all that based on a long loop we plan to do starting down at Leano Lake.  Plus, whereas Wabakimi fishing is restricted to Walleye and Pike, WCPP also has Lakers and even bass in a few of the southern lakes.  Last year we took the train instead of driving and boy was that fantastic.  We'll be doing that again this summer - an adventure within an adventure.