I OC into River Valley and First Forward a couple of times a month. No issues, was thanked by the manager at RV for carrying. I have no relation or previous experience with them. I walked in OC when I went there to open our accounts, and asked about it while they could see my firearm. No problem at all she told me, and did not seem the least bit bothered by it. I can absolutely say that they all recocognized me there the next time I came in, and they all called me by my first name from the start, and are very friendly. I suppose that's one way to make an impression?
Across the street is Park City Credit Union, where I was told we don't want your money if it comes with a firearm. So, they didn't get it. It's not millions, but more than a couple thousand.
These are Wisconsin banks, your state may be different.