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A study done in 2007 suggested the striper diet to be 64% shad and 12% crawfish in Lewis Smith Lake.
I would suggest taking a guide trip out there.
Bill Vines www.striperfishingheadquarters.com
What you can learn on one trip with a knowlegeable guide will defray the costs in gas and bait alone over the season learning by trial and error.
The lake is 200 feet deep in spots.
Live shad, available locally, are the preferred bait.
Good luck. Post pics.