Hey man, where are you at in Iowa? I'm from the Iowa City area and I drive the 2 hours to Chestnut or Sundown almost every weekend. I'm no expert (intermediate), but if those are the parks you frequent I could definitely watch your riding and help you out some time.
Currently I'm in the quad cities/davenport, I went to UofI there before moving for my current job. I'll be boarding this Friday at Chestnut, hit me up on PM if you want meet up.