Don't forget that warm water sinks until after the turn-over. You'll know when the turn-over has occurred, that's when the fish are no longer in the deeps, they'll be mid level and up.
I did not know that. This is my first time fishing this early in the season. Normally i don't fish until June. This pretty much changes things. I guess i will have to watch the shallow waters for fish movement to tell whether or not they have moved to start spawning.