Thanks to everyone for your responses. You provided a lot of good info for me to consider. For an update, I decided to incorporate a couple of different ideas in these responses. We switched to plain light wire hooks baited with minnows rather than jigs tipped with minnows. Also went with more of a moving approach, rather than finding brush piles/stake beds and fishing straight down on them, I slowly trolled over and around them.
We didn't exactly tear them up, but we did manage to put some keepers (and a lot of smalls) in the boat the last couple of days. At least enough to get a decent family meal out of. Also what was interesting, after switching to this new approach we started catching a LOT of other species...a few keeper and a lot of small white bass, quite a few eater size catfish, tons of yellow bass, and an occasional largemouth or bluegill. All together for 3 or 4 people we went from 4 or 5 fish total in a morning to 60 or 70 (that's all species, keepers and dinks, together). Even if we didn't bring in a haul of keeper crappie, as the "guide" for the weekend I was glad that I got to provide action of some kind for my dad and a couple of people in our crew who are pretty new to fishing.