I have removed the only cache which I managed which was in a state park, and placed a new one nearby in a county park. County parks in my area are much more numerous and much more used than Iowa State parks, which suffer from too little services, and for one year, even required fees to be paid!
So, at the moment, I am not considering any caches in state parks at all.
When the DNR gets their act together, and provides useful services, and allows
legal caching without a lot of red tape, I may consider using state parks again.