Where did you get that host info from? The NCAA's own website states Union as the host, rather than the conference.
As for the rest, I know there has been a lot of back and forth about regional attendance and I'm certainly not privy to all the arguments, but you'd be hard pressed to get 15,000 at any eastern regional. Many eastern schools don't even have student bodies that touch that number, and that's before you even get to alumni bases and other potential avenues of fan attendance along with on-campus attendance decline trends.
Since Albany was mentioned, let's think about potential attendance there. The biggest pulls would be Cornell (large traveling contingent and heavy alumni base in NYC with good representation throughout upstate NY and New England) and Quinnipiac (proximity and alumni base concentrated in NYC and Connecticut) as far as teams that should be in the tournament. Beyond that, it's a crapshoot given the lack of HEA teams, and all other tournament teams being farther away, so good luck even coming close to that 15,000 number.