Streamer fishing on the Delaware system can be fantastic if you catch a good day. If Cannonsville has been overflowing Alewifes will be dumped in. Big white streamers will be the ticket. Strip them erratically. I think many of the patterns here will work well. I'm partial to white however.
You can fish them on a simple, short, 4 to 5 ft heavy leader.
Don't count on catching Rainbows... for some reason they tend not to eat streamers that often up there.
For a real treat I suggest you hook up with a buddy and fish from a drift boat which hands down is the best way to fish streamers up there due to the size of the water. Call the Delaware River Club and ask to go out with Bruce Miller. He's one heck of a guide, a hell of a nice guy, and a master at streamer fishing in the system. It's his specialty. Tell'em NJFred sent you.