More free (and worth it!) advice in the spirit of support:
Individual states are an almost useless way to assign people to competitive divisions. States edges are often along rivers, and those same rivers often have metro areas straddling them, so people identify with the City more than the state. States are not the same size, do not have the same number of people, do not have the same shape, have too much border for their area, are not homogenous within the state, and do not have the same number of courses.
Delaware = California?
New York City is more like the Finger Lakes region than it is like Newark?
If all states were like Arkansas, these wouldn't be much of a problem. It has a fairly compact shape, where most people identify with the large city in the middle of the state, and its population is within a factor of 2 of the average.
Groups of states can reduce the effects of most of these problems. The PDGA regions for NT tournaments are a nice set of regions that are based on groups of states. See:
http://www.pdga.com/2011-nt-goes-elite
The only advantage to using states is that people can identify with a state.
Disc golf "centers" are not that easy to define either, for the most part. Disc golf course groups are just about as "stringy" as they are "clumpy". Most places with a lot of courses do not have them arranged in a centrist pattern. See picture.
This site:
http://www.commoncensus.org/maps.php has a start on what is perhaps a better method. It groups people according to the nearest "big city" they identify with.
Perhaps you could further divide the NT regions according to the city (or disc golf center) people identify with.