Was there on Sunday with my Dad and son. I thought the venue was nice. I agree it was somewhat cramped. Many vendors had their chairs in the walkways; seemed like the tables were pushed so close to together to maximize space utilization, that vendors mostly couldn't sit behind their tables.
We picked up some small things; I went for a WBB 4-6-0 in Southern livery. Seemed to me that WBB prices from several vendors matched street or ebay prices.
After reading the posts above, I realized that yes, the number of layouts was small, and no O. There were other spaces in the center; a Miss Delaware Fashion even was taking place so there was no shortage of space in the entire center. The overall newness and cleanliness of the place made me wonder how much more vendors had to pay for their tables. I for one hope the event continues at this venue.