I'm new so don't take my post for gospel, however, on the main page of crappie.com there's an article link, read up on those a bit..
The highlights seem to be:
Color of jigs/bait depend on water clarity - course you can always use live minnows.
Fish in general will be in/around/near cover so find underwater trees/rocks..etc.
Find where the bait fish hang out and you'll be close.
Water temperature matters alot as to where the fish hang out. Hotter water they will generally be at deeper/cooler cover, colder water they'll generally be shallower more dense cover (I'm guessing to stay safe/save energy/be near food).
Since your lake is mostly the same depth I'd be find out all the tree/rock spots and temperatures of the water around the whole lake. I'd figure the sping end would be coldest in spring/summer maybe.
I'm a total newb but my approach would be to find trees/brush in the water, fish that for crappie, and notice around me. try different colors and such. if I had a boat I'd probably verticle jig with a dual jig with different colors until I found what they liked to eat.
*shrug*... sounds like shooting fish in a barrel to me *shrug*.
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