I am no expert. The guy you need to speak with is Randy Wood. That said, I have fished PK for three years and have caught just about every species in the lake. Where is your dock? This is a 65 mile long lake and it fishes very different at Neely Slough and the Dam vs North D & D and up toward the Brazos.
If you are going to fish PK, the first thing you need to do is learn to use Fluorocarbon line. The lake has water as clear as those you find in the Ozark Plateau. I use a 20 LB test Fluorocarbon leader on 12 LB test mono. Seems to work well. You'll need a lighter line for crappie but stripers and LM bass will hit the same stuff and you will lose them.
Sand Bass fishing at PK may be the best in Texas. I have never fished anywhere that had as many white bass or as many 16 inch white bass as PK. I think this is due to the sand bass recovering fast from the GA and over populating the lake. These white bass will frustrate any crappie fishing you do, as they are far more aggressive and hang out in the same places allot. Anything white or Chartreuse seems to work. My favorite bait for them is a 16/ oz Chartreuse jig with a white body chartreuse tail jig made by Rage tail. Last summer, I could catch a limit of sand bass in about an hour at the cliffs marina in Neely slough. Every single cast caught a sandie. If you ties on three jigs you caught three sand bass.
Striper fishing is still very good at PK but the fish are scattered. The state wrote off the lake after restocking several times before the big flood. In the future, they need to just drain these lakes with GA and get it over with. The stripers we have now have survived multiple GA attacks. The state stocked stripers again last year and last fall I started catching allot of 8-10 inch stripers. Those will be 16 in this year. They have to be 18 to keep.
While not know as a Largemouth Bass lake PK has some seriously big bass. There used to be Smallmouth in the lake but the sate stopped stocking them. I hope they re stock the smallies after they come to their senses that the lake has recovered. The salty water must be good for these LM, as they fight very hard. Early on, I lost a lot of them until I discovered premium hooks like Gamakatsu.
The Crappie I do catch at PK tend to be big. Those 8-10 inch guys that dominate at other lakes are probably devoured by bigger fish.
Since you have a dock, you should look into getting some of these green fishing lights. It will save you a bunch of gas because you wont have to chase fish all over the lake. They will come to you. There's a dock on Gaines bend with these and every evening massive numbers of fish come into that cove to feed on the minnows and shad attracted to that light.http://underwaterfishlight.com/
Good luck to you. I will be out later this week to see if the spring fishing has taken off. Should start any day now.