i havent fished winni much but on the lake that i catch them i fish on a big flat thats 15 to 50 feet deep dropping off to deep water, the white perch seem to like 20 to 40 feet there, i start in 30 feet and move the traps til i find them, once you find them you can jig or even drop the minnow on the trap down the hole and handline them feeling for the bite. if you attached your email some that fish for them on winni might be willing to send you more info, i would post on the nh iceshanty forum as well and leave your email there as well, most dont like to give spots or info on an open forum