I've never had an issue with golf carts at the Nats. Every year people complain about the carts but I've never had a close call. This year at Carlisle however, I did almost get hit by a golf cart. They were announcing all weekend that motorized vehicles weren't allowed but I still saw them all over. There was even a company in the swap area that was renting out scooters.
The last few years at the Nat's have been a lot better in reguards to trash and bathroom cleanliness. Maybe it depends on what bathroom area you are going to. Other then needing some type of air freshener(like they have in the bathrooms at Carlisle) I haven't had a problem.
The judged show just keeps getting smaller and smaller. After going there for so many years, it's just become stagnant. Something needs to change to get the excitement back IMO. I usually would be getting excited weeks in advance. I'm just not feeling it this year. Not to mention the fact that a new truck payment, car insurance and medical bills all seem to pile up at once this year.