I went through a 10 year stretch of trying to catch a shad. The first attempts were by the old factory on the PA side in New Hope. There was a small island that you could wade across a piece of high ground to get too. Ankle deep during low water, sometimes chest deep when the river was running high. There was an old spill way against the factory that created a current seam that ran close to the river side of the island. I did see a guy catch a couple of shad on a fly rod from the tip of the island. No such luck , I made a couple of trips up river, stopping at the wing dams and access points getting as far as Easton. No shad.
Just as I was learning to fly fish. A skiing club I belong to booked a X-Country ski trip at a place in PA across the river from Hancock. Turned out the owner was a guide on the river and we booked a trip with him. We fished the east branch, wading and using spinning gear we caught a 1/2 dozen shad.
Next year I brought my fly rod. One day we waded the same area as the year before. I used a sinking line with 6 to 10 foot leader of 10# test, cast upstream and let the line and fly or flutter spoon swing across the current and then let it hang in the current for a few minutes. Most hits occurred on the swing or when it was hanging in the current. I hooked a couple of shad but lost them when they jumped. Did land a couple of fallfish and smallmouth. Next day we used a drift boat but had to abort the trip halfway through because of rapidly rising water caused by heavy thunderstorms overnight upstream. We did get a chance to fish a couple of times. Anchor the boat, cast upstream to get the fly to sink, let the fly sit downstream for a few minutes, retrieve and repeat.
Now that I finished my ramble. I agree with poopdeck, if you take your boat out use spinning gear if you want to catch a shad. Bring a fly rod along. I recommend a 6 wgt rod, full sinking line, a 6 to 10 foot 10# test tippet. The flies are flashy. I still have some, I'll see if I can find them and take a picture. I tied mine on a gold hook, a size 6 Eagle Claw gold Aberdeen crappie hook. I used the gold or silver dumbbell eyes. Heavy enough that if you get hit in the back of the head with one you'll winch. Estaz thorax, floss body, tail of either marabou or calf tail. Or a body of Estaz. Colors use shad darts or flutter spoon as models. Can't go wrong with red/white, chartreuse/white. The Delaware River Shad Association web site posts reports and what color darts and flutter spoons they're hitting. The commercial fishery in Lambertville has an e-mail list you can sign up for. Whenever they set out their nets, they give you a full report of what they caught, how many of each species and also give river temperatures and river levels. I haven't gotten a report yet so they haven't started fishing.