I do alot of rainbow fishing and caught hundreds of trophys over the years, fish over 20 inches, my best presentation to catch bigger fish has been on a deadline, use a polar tip up and have it a distance away from you, i keep that hole quite check it about every hour to make sure my bait is still there, I use berkley vanish or sensation almost invisible i believe the big bows get line shy, on my line i have a frozen minnow and a small gammi hook and about 12 inches up a small split shot, bait your hole with corn or minnows or shrimp if allowed , place your hook about 4 inches off bottom walk away let it sit, i have even had my line about 2 feet below the ice hole caught some like that also, find weedbeds fish them i like 5 to 8 feet of water, dont make allot of noise either on the ice like walking around. keep your hook small and place minnow vertical on it. This has been very affective for me over the years.