I used this book for planning when I was planning my 2008 trip from Lake Superior to Hudson's Bay.  I have also used it to plan trips in the Atikaki Park of Manitoba.  The only issue I had with this book, and also "Wilderness Rivers of Manitoba," were that both contain information now out of date for the Hayes River and the portage locations on that waterway.  The Hayes suffered a forest fire of considerable size within two years of the books publishing date.  The Hayes had this forest fire sometime between 2003 & 2007.  Besides that, I recommend both of these books.