Just wanted to thank everyone for their advice. As usual from this forum, I received some excellent comments.
I know that one day at The National is probably similar to taking the City Tour of Paris and claiming to have seen everything in the city, but I can't rearrange my schedule so I am going to make the most that I can out of that day. I also hope to meet some Net 54'ers at the convention.
One more question. Will it be fairly easy to walk up to pay for admission, or should I purchase admission tickets over the internet.
Thanks again everyone! Have a happy and safe Fourth!