When looking at the AG list of places you can't carry -- the beginning of those 16 places state IF properly posted (if not posted, or if posted improperly then you can carry).
Posting must be within 12" of door and 4'-6' height above grade.
We have a couple of places that have intentional posted improperly to allow carry while the uneducated but apprehensive think "good, it's a safe place for kids because there's no guns".
Remember -- federal buildings don't have to post and you still can't carry (Post office, IRS, FBI, etc).
If you come up with any specific questions, ask. I'm not a lawyer, but I am a Ks CC instructor.