Went and saw them at Charlotte two summers ago all by myself. I was actually planning on meeting up with a friend living there who believed she was going to the show, but it turned out she mistook it for a John Mayer concert the week before. It turned out alright though. It was a little awkward at first, but eventually started talking to some of the people around me and had a good time.
Last summer, I decided to go to the Chicago Caravan at last second, and took the Greyhound from ATL to Chi-town alone and stayed 4 nights in a hostel by myself. Farthest i had ever traveled alone before, and to a giant city I had never been to before, so needless to say I was a little worried. But thanks to Ants, I was able to meet up and hang out with tons of great people, including spending all three days of the festival with two awesome ants. One of the best weekends I've ever had really, and it was a great experience traveling alone too.