That site you mention on Shirley is nice, and the one below it is nice too(although not as nice as the one you want).
The first site in Ancona bay is large and sweet, the second one(further up), is useless.
Look at my recent post(back from access#17), that is the 2nd one below the narrows...sweeeeeet!
Cheers
Mark Rubino
Mark's Algonquin Park Sampler - Blog
Mark's Algonquin Park Sampler
http://www.ABRweb.ca .. Algonquin Backcountry Recreationalists - Caring for Algonquin's Backcountry