Minnesota’s fisheries advice describes crappie gathering in shallow bays before spawning and using deeper water later, with renewed shoreward feeding at low light. Ontario also identifies the ice-out period as a useful time to find fish following bait into warmer shallows. These are habitat patterns, not a Canadian opening date.
In a sheltered spring bay, begin with the first cover outside the shallowest water. Fish the outer branches, the edge of old vegetation and any small change in depth before working farther in. A dark bottom may warm differently from a neighbouring exposed shore, so search several nearby pieces of habitat rather than treating the whole lake as uniform.
After fish move deeper, use a weed edge, submerged point or timber standing beside a drop-off to organise the search. You may need a sinking line or a longer wait before retrieving. If the water is too deep to fish and release catches comfortably with the equipment available, choose a shallower opportunity instead of trying to force the spring method into it.