I'll second the opinion already stated about the book "Pike on the Fly" by Barry Reynolds. It's a very good read and I highly recommend it to anyone who might be serious about pursuing pike and muskie on a fly.
It's hard to add to the advice that's already been given, but I'll give you a common misconception about these fish in the pike family: the fallacy that they're very active after dark. Unlike bass, pike and muskies are fairly inactive after dusk when the darkness is complete. It's usually not worth your effort to go after them at this time. Why? There's a few theories kicking around that I won't get into, but suffice it to say that your best fishing will be from dawn to dusk.
Good luck, and let us know how you do!