Pike will hit just about anything. I've caught as many pike on walleye/bass sized flies and lures"by accident" as I have on much larger flies and lures. I have lost a lot of crayfish pattern flies while bass fishing to northern pike.

I use larger clousers, red and white deceivers, and flies tied with bunny strips, such as a double bunny. Last year in Ontario, Murdich minnnows worked well for for me. In addition to flies that have a lot of color and flash that are designed to be fished fast, take a few bunny leeches. Sometimes pike are lethargic and a slowly fished bunny leech will work when flashier flies don't work.

This time of year, getting your fly deep might be necessary. Take whatever sink tip or sinking lines that you have so you can fish deep. An eight weight will be fine provided that you tie flies that aren't too big or heavy to be cast with your eight weight. I usually use 30 pound test saltwater leader material for my pike fishing leader.