On Thu, 03 Aug 2006 21:30:46 GMT, Matt Whiting
wrote in :

Denver, Kansas City, Minneapolis, etc.

If you look he
ftp://ftpserver.ciesin.org/pub/data/...usdenssmoo.gif

You'll see that your first two suggestions are far from the areas of
high population density.

If the AOPA convention is too far from the population, there may not
be adequate attendance to attract commercial participants, and revenue
will be too feeble to cover costs.