Are you bringing your cell phone? Because we'll all be there in your pocket with you! Post if you feel you need to.
I've attended concerts sober even when I was actively drinking because, well, I didn't want to waste the money that I paid not fully experiencing what I went there for. I'm a huge RUSH fan and I wanted to hear every word, note, and drum beat. Being under the influence would have deadened the experience.
It's a world of difference attending a concert sober. Go and have a great time and remember, we are there with you!