It is tough for the far flung western conferences to hold tournaments that are well attended. That is why the neutral site tourneys in Nevada work better than most any alternative.

For the Big Sky, we have tried many different approaches on campus sites - limiting the number of participants, having it at the regular season champ (too difficult to make last minute plans, especially if you don't know if your team is going to make the tourney), having it preset at LAST Year's Regular Season champ, etc.

Neutral site is the best overall bet. Spokane would be the best location, as drivable for EWU, PSU, Idaho, Montana - with doable driving for Weber/ISU/MSU.

For the Pac 12, Vegas is perfect - drivable from the biggest traveling fan bases (Arizona then UCLA, plus easily drivable from ASU, USC and Utah).