Ok I got my permit finally

I went to gander for a shoulder holster, guess no one makes one in the 6'5 490 pound range . Non would fit me right, the guy at the desk said one looked find, but givem the belt loop on the holster sat at my side 6 inchs above my belt I DOUBT IT fit me right. So I went with a nice uncle mike size 5 belt holster for my glock 21. Between the glock 21 being huge, and the holster alittle long IT ANT being concealed, though m y big body build and my coat does a good job of it.

I have a few questions
First is there any places out side of the normal, IE police station, airport, fed building, school where you can not carry, thinking like the post office or say a bar?
Second

IN indiana and well florida since I spend alot of time there, do I need to say officer I am carrying a firearm should I be stopped somewhere or pulled over when driving?

Third does anyone know aplace that does custom shoulder holsters prefer the non leather type