I went onto the NJ F&W site and it looks like they stock tiger muskies in Shenandoah. It says they're a "sterile" hybrid of pike & muskie. This leads me to believe there isn't a big population in there because they can't reproduce. Also, the average stocking size, if I remember correctly, is around 7". This size is "baitfish" for big picks & lm bass, so survival rates must be a low percentage of stock rates.Musky, the fish of a thousand casts or at least that is what they say. I have a co-worker that caught a 27" musky out of Shenandoah while he was fishing for bass. I have not heard many stories about musky being caught in shenandoah.
If I were to target musky I would use a very large live bait. When I was a kid living in Vermont we used to use 8"-12" suckerfish for bait while fishing for northern pike and musky.
I didn't see anything about them stocking regular muskies, but I also didn't spend a lot of time on the site. If they do, it's good news because they have a chance of naturally populating the lake.
Don't get me wrong, I love pickerel fishing, but if I can catch a bigger fish with teeth (in freshwater) in southern jersey, I'll target it.