george, my reading tells me that wipers will hit both on the surface and quite deep. the 27lb 5oz world record was caught at 45 feet on a diving crankbait. i see the 10 inchers i put in my lake last fall hitting insects on the surface at all hours of the day and night; so i suspect you won't need flies that resemble pellets.
greg. one of the reasons i'm adding wipers to my lake is because my wife, and my son and i all enjoy using a fly rod. i have a 7 wt just waiting for these fish to get to 3 lbs or better. any idea how much of their feed will be pellets? jb