signs
I live in Iowa and this is from Iowa carry. org "Generally, once you have a PCW, you can carry a weapon anywhere except those places prohibited by any restrictions on your permit and these locations prohibited by law:
School zones and parks - Illegal to possess a firearm if you commit a public offense (724.4A))
School grounds - Illegal to carry (724.4A(1) and 724.4B)
School bus (Administrative rule 281-43.38(2))
Casinos (Administrative rule 491-5.4(6))
Capitol Complex (Administrative rule 11-100.2(8A))
State parks and preserves - Prohibits use, not carry (461A.42)
State Fair (Administrative rule 371-2.5(173))
Federal facilities, grounds, and courts
Businesses may also elect to create a "safety-free zone" by requesting that customers do not carry weapons on their property. If you carry a weapon on their property, you may be asked to leave. If you fail to leave, you would be cited with a trespassing charge, NOT a weapons charge. "
And for me if my gun isn't welcome then neither am I or my money, there are other places with the same product that don't mind my gun and like my money.
Oh, and the fair grounds, get this one, that is where they hold a lot of gun shows. You can't carry there, but the state doesn't mind making money off of you by letting you buy guns at the gun show. So needless to say I don't go to the gun shows.