I went over July 4th week and was OC'ing the whole time. Never a second-glance from anyone: boating, stage play, hotels, restaurants, restaurants, restaurants. I know there were no second-glances because it was my first time doing it with my family of 5 outside of Texas. Boy, were they conscious of it, and I asked them about second-glances.
Never saw a cop though. They'll demand papers if they want to.