I think a minnow trap will work as long as the holes are a bit closer to the bottom so they can get in easier. Go to the hardware store and get yourself some tiny mesh chicken wire. Cut it to the size you want and roll it up. Make two cones and attach them small side in to the cylinder you made and you are ready. Take it to your spot and set it up as instructed with some enriched bread and wait. Hope that helps. Seining riffles against the current works well also and is faster. Set your seine up and have a friend work toward you in the water. Easy as pie.