I have OC'd at the Coralville Scheels as well. No issues.
Last night my wife dragged me to Stuff in Coralville. I hate that place, but no issues there. After that I went and paid tribute to the local starbucks, who, by the way, havent even heard of the boycott. Must not be that effective.
But the best one yet, made me proud of Washington County Sheriffs Department. On saturday I went shooting with some friends at clemens creek. After exhausting our ammo, we went to pizza ranch for lunch. As we pulled in, we saw four county LEO cars in the parking lot. After some deliberating about what to do, I spoke up and said, "Lets go. Dont worry about it." We proceed into the ranch, pay for our lunch, and proceed to the buffett. There were 7 deputies, dressed in military garb, sitting at the table near us. A few of them did a double take, some stared, but none of them moved. They greeted with a nod of the head, which was returned with a smile. We were never approached or talked to. When they left they did so without issue. It was a good feeling.
A friend that was with me needed some advice after lunch. One thing I noticed him doing is watching people to see if they were reacting.
My advice to him, and to other OC'ers: If you look suspicious, you will be treated as such. I asked him what he would think if he saw a person with a gun looking around the restaurant nervously. It changes a persons opinion of you instantly. I know it takes some time for some people to get comfortable open carrying, but if your going to do so, try to make people think that you are just another person conducting business as usual.
Just some friendly advice!