Sorry I didn't see your post until now. Prairie creek channel cats usually run between 2 to 4 lbs. They are scattered from one end to the other. The numbers are fair and, if your good at reservoir catfish fishing, you might do well.
I would not recommend driving much of a distance for prairie creek cat fishing. Brookville reservoir would be a much better place. The place is loaded with 2 to 10 lb cats. Often while trolling for walleye, I will catch several nice cats. At times I have to move to another spot just because the cat fish will hit about every type of bait or lures I use.