you have a lot of options. I'd hit a bigger river like the bow, then a smaller one like the upper highwood or livingstone, then an alpine lake that scott mentioned, then pick a random tributary of the highwood, elbow, or bow to explore (check your regs).
after that pick your favorite to fish again
may also wanna fish Pine Coulee reservoir. Go on a weekday, fish a streamer on the bottom. Walleye every second cast most days if you figure it out.