I would carry shrimp flies in various sizes, and colors, hair wings like cossebooms, Ross Specials, Undertakers, Rusty Rats, in sizes from 2-10, some marabous or rabbit strip patterns in 2/0-4, and any classic flies, Dees, Speys, etc are well worth having. All flies must be un-weighted, and barbless.
Unless fishing a dry fly, the fishing is all swinging. Unless you have the pool to yourself the general rule is " take a cast, and a step down." If you have any questions feel free to ask another angler, most people are super friendly and willing to help out. Depending on the water conditions a sink tip can be very helpful, assuming it is used correctly. Don't get too flustered if someone makes a comment about fishing a sink tip though, there are some people who frown upon them. Many people, including me, fish them and it is not as faux pas as some will make it out to be.
Here is a link to a water chart for the river- http://www.wateroffice.ec.gc.ca/grap...ml?stn=01FB001
Enjoy your trip, it is an amazingly beautiful watershed. I'll be there this Friday to Monday and can't wait!!