Correct. A local, current county judge here in Laramie visits concealed carry and handgun training courses upon request to discuss legal ramifications of carrying firearms. According to him, you cannot concealed carry to a meeting with any government official in the state, and that includes your local librarian. If you invite your librarian to a meeting on private property, you cannot concealed carry at that meeting.
However, open carry is completely unrestricted, everywhere, on public and private land, in Wyoming. Open carry cannot be denied in any public facility. The local hospital posts "No Weapons" signs with images of guns and knives with the red circle/line around/through them. According to the judge, that is PR only. You can openly or concealed carry (with permit) on the hospital property without interference, and because it is a county hospital and therefore public property, you cannot be asked to leave for doing so. You can openly carry into any local or state facility, onto any college campus, into any school, etc. The only restrictions in Wyoming for carrying apply to concealed carry only.
The judge also told us that "no guns" signs on private property also have no force of law behind them, mean nothing, and can be completely ignored. However, if you are asked to leave private property, then you must do so, immediately, no questions asked. Failure to comply with a request to vacate the premises can then result in trespassing issues, which you do not want.