We usually go into the thousands... really fun event it is. Even when you are not competitive, it is a really great time. Even going just to meet other beachers is worth your pay. I love hanging with the whole lot of former Beach people (Mishik, SOM, etc). The tournament is just the side attraction. You WILL meet somebody there that you will talk to a lot online.
Zele, make sure you get a hotel CLOSE to the event this time ;P They kept it in Indianapolis because EVERYBODY loved it. Last year was the best nationals ever... undisputed. We had a LOT of room and a very nice amount of hotels all over. It would be dumb to move it anywhere else (except Chicago ;P)