Help with Raccoon creek state park

Like most lakes in the area, seasonal patterns are most likely the reason for your current struggles.  We are in that transition to summer time patterns on most lakes right now, which unfortunately are also known as summer doldrums to most (including myself).  The shallows are warming up and fish are suspending in deeper water, usually a some sort of structure that you need to figure out and then figure out how to get them to bite too...  This makes shore fishing pretty hard.  It makes fishing from a boat hard too.  I mostly fish Arthur and have been trying to figure things out there for years.  I often end up with days of a bluegill or two, some without anything.  Even when I think that I have figured out a pattern, it changes the next week or year, etc.  Just a hard time of year for many inland lakes.
 
Most likely in April/May, doing the same thing you are doing now, would have you into fish.  Or at least see guys getting into some and giving you faith that fish are around.  October/November will likely have you on fish.
 
There is a guy that visits this site on occasion that hammers some nice fish at Raccoon, so I know there are nice ones there.  I'm sure that he has figured out some summer patterns too.  Maybe he will chime in and give you a hand.  If it is your home water, don't give up on it completely.  When you figure a few things out, you will be rewarded.  Try at dusk or dawn, it may bring some of those deeper fish in closer for a bit.