Londonderry is upscale, Derry is working class. That alone implies a distinction in how OC would be received. I never had a problem in Merrimack, which is comparable to L-Derry. But I was also a resident and the cops treated residents differently than non-res. My two warning tickets being a good example. Non-Merrimack residents would have been ticketed, I have no doubt. They did ticket my son when he was a teenager and then called me and said they would recommend Traffic School for him, no fines or points. I never got a second look when OCing, although I generally carried concealed. If it's your town/city, do what you feel comfortable with. If you want to OC, do it. You pay taxes there and should expect consideration when exercising your legal rights.