I've never fished the Allegheny so take this with a grain of salt: yes, you can catch them wade fishing. Look for deeper, slower water with cover. This time of year they tend to be in the mid sections of the river but don't pass up a cold water tributary, esp further downriver from Kinzua where the main river is warmer. Bridge pilings or big logs jammed in mid river are good spots, esp in the slack water just below them. You aren't likely to find them in current or riffles but this is possible, esp in summer. River muskies seem to like a bit of stain in the water (like right after a thunderstorm) and bite best in the lower light conditions during the summer.
Since you're just getting into WW fishing, I'd recommend you throw a big streamer in the 5-7" range (anything larger will be tough with an 8WT). Flies this size are on the small side for muskies but will look and feel huge to a WW newbie. And, flies this size will also catch smallies, walleyes, and big brown trout which I'm sure you won't object to.
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I like natural color streamers when the water is clear (browns, greens, maybe some yellow or white) and bright colors when the water is stained or cloudy (orange, red, chartruese, black, pink etc)
So go get out at dawn and pitch big streamers in the Allegheny. Something interesting may just latch on.