I was in the pits 10 years ago. I'm not located in Chicago at the moment. I know about the dynamics and the clearing firm requirements, and paperwork issues, I went through that before.
I left when they were building that new bond floor, at the cbot. The clearing firms really push scalping, and frown on position trades or holding something overnight. Some firms don't mind.
More then anything, I find that trading alone, I burn out faster during the day. After I make some nice profits for the day. I just shutdown. Even though I can still see profitable trades/setups for the remaining hours.
I would probably fly in and stay at a hotel, for about a week and trade, and fly out. I havent had a losing day in a long time. The other thing that worries me is trade reconciliation. A 100 lot full spoos trade not reconciling the next day, wouldnt be a good thing. And usually the 'mistake' is shared 50/50. Imagine in a fast market and the opposing trader throws the trade out, and meanwhile you think your clear of any positions. And the market moved 10 points from that point.
So there are some drawbacks. But having the ability to enter the floor and trade the action is something not found anywhere.