Thanks 2nd2non for the info. I am familiar some with the area when I was stationed at Scott Airforce base, but that was over 20 years ago. I will watch for NFZ's and use discretion, as I am pretty conservative in my flying.
2nd2non, I am going to St. Louis on business the week of 4/11/16. From your post and what I am reading, the Arch is basically off limits to fly around.
Any suggestions while I am in that area for the week?