For Alberta, get hold of Mark's Guide for Alberta Paddlers; it's for sale at the Alberta Recreational Paddling Association.
For BC, the best source I know of is Jack Wainwright's "Canoe Trips, British Columbia"; it's from 1994 though. People here can come up with other books.
In general, recommendations can't be made independent of knowledge of your skills and experience. Your best bet is to read a lot, assess yourself and your companions critically (Mark's book has a dandy self-assessment scheme), then come back with questions on specific Routes.
Yours in paddling, Allan
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A literal mind is a little mind. If it's not worth doing to excess, it's not worth doing at all. Good enough isn't. None are so blind as those who choose not to see. (AJ)