Hows crappie fishing on the delta?

I always wanted to fish the delta. I saw a trophy panfish page for the delta the other day and they did not show any crappie, looked like all redear.

I saw some pics just the other day from a gentleman that caught a nice stringer somewhere on the delta.... I hope someone can chime in as my parents live in Martinez and I would love to pull the boat up there for some slabs!