Shad for blues. Night crawlers are lethal on channels and I have also found the smaller blues when in the river systems like them alot too.
Yep.
Catch a rise on the river. Or flooded areas of lakes.
NightCrawlers, and or Grasshoppers will work great.
Shad hammers blues year round.
Spring time run off. Nightcrawlers or grasshoppers shallow.
Good-Luck.