I have a lake house on PK and probably spend 150 days a year fishing that lake. I catch a few crappie but it's tough fishing for them. The clear water makes jigs a non starter if you ask me. Crappie have excellent eyesight and if you give them too long to look at a jig in clear water. Besides, while they are checking it out a sandbass will likely grab it.
Most of the crappie I have caught at PK have come by live bait or trolling or casting Chartreuse Bandit 200's. For every crappie you catch, you'll get 20 white bass. Got these last summer along with a few sandies trolling crankbaits. There's two crappie and a couple sandies in here.
Clear water is going to be your enemy. Here's a stringer with one crappie a nice cat and some sandies in typical PK water. This past summer I could sight fish in the coves and creeks because you could see the bottom easily in 15 feet of water.
Here's a couple more I got last summer trolling crankbaits right at dark.
Night is your friend at PK. I caught the black crappie below at a dock on Neely Slough using a green light fishing with live shad. Note, the state does not list black crappie as a game fish at PK but they are there.I caught several crappie at that dock last year but only one a night. I think a lot of the problem is that the big stripers eat these crappie. The pic below is a 30 inch striper I caught the same night using a perch for bait. ( perch, crappie all the same to a big striper)
30 inch striper caught on a perch. This is why those crappie stay real close to the dock and don't venture far out. I'm sure the stripers and big largemouth eat the crappie.
Here's the result of a crappie fishing trip last winter fishing with live minnows. Two big stripers.
I'll be glad to show you what I know about the lake if you want. Just PM me. If you plan to fish Lake Graham you'll need to get to know Hickorynut on the forum. He's the expert there.
Good luck to you