If you know where the KYDFW beds are located then I would by all means sample 3-5 of them but I wouldn't spend more than 5-10 minutes per bed unless you are catching fish. Of course if your catching fish then you've got your game plan for the day. The crappie are very aggressive right now so you shouldn't have to wait on a bite very long. If you're struggling to get bit in them then I would go to your plan B. I would also make a mental note for the beds that produce and be sure to hit them at least 1 to 2 more times before you get off the water because if the bays your fishing have fish running/ spawning then those KYDFW beds should reload fairly quickly.
Just remember though that every person with good set of eyes knows where those KYDFW beds are at also so they get hammered really hard.