My buddy and I were at lake Joe near Pt Carling today. We marked lots---and I do mean lots---of fish, presumably lake trout suspended at 10-20 ft deep. We mostly slow trolled lures such as fairly big Little Cleos and deep crankbaits with nary a bite. I think the lures were running deep enough as we both hooked bottom once or twice in maybe 15 ft of water. We also did a very slow drift with sinkers and worms over an area where we were marking fish i.e. ice fishing technique. again---nada. The water temp on my FF showed as zero. What gives??? Does the water need to warm a bit? We had never tried for ice-out lakers before.