Baltimore (Wizards Country encroachment, a provocative pick)
Omaha is down on the list, also. They used to play part-time in the NBA (the Kings).
Let's look at this from the standpoint of expansion "ain't gonna happen". It's where we're at. That doesn't mean that the NBA can't expand the brand. Were I an NBA or Celtics marketer, I would at least do a home(camp) stand in Kansas City in the heart of America one year. Then next year, Cincinnati. Boston's team would wear "Celtics Country" jerseys to those games. A green C styled like the Cinci's Reds for a stint playing the Cavs in the nnati.
A little absence makes the heart grow fonder. An event can generate buzz. Apparel sales on the increase.
See where I'm going with this?
Any other franchise camping that you could think of?