What Salmo G said.

Its easy to stay off of the reds and not catch fish that are staging. You just need to identify the area.

No question the later it gets the more encounters you are gonna have with post spawn fish (mostly Hens). These fish are feeding and very agressive and holding in water that food is likely to foat by.

I dont target post spawn fish and dont care much to catch them but if you fish after mid March your gonna see some no matter what you do. Which is OK.