since RI dosen't have a location yet, there is a hotel right by the commuter rail station at Providence that can hold this. They had a really esquisite hall to hold it in that can easily hold 3-4 venders as well as 100-125 seating. Its the Reinassance Hotel.
Renaissance Providence
5 Avenue of the Arts, Providence, Rhode Island 02903
Went there for YuGiOh regionals. It was a great place to play and the mall is right across the street.