Looks as though its around 71kms distance. Flows can be found here:
http://www.environment.alberta.ca/ap...tionID=RPEMENT
I usually try and stick around the 30-35kms per day paddling. makes for a nice leisurely depart in AM and you are not rushed on the river. Leaving time for fishing of course!!!
Should get Mark Lunds guide to AB rivers book. Im sure that section of river is in it and it can give you some better information as far as rapids and stuff to avoid on the stretch of river you are planning on doing.
PS: best camping you can do is along a river bank!!! peaceful and beautiful. Hope the trip goes good for you