[EricH]

There are also 2 simultaneous Minnesota regionals. I would suspect that method, rather than the "super regional" method that was used at GTR some years back.

For those that weren't around then: super regional means 2 fields, winners of each field play each other for the regional win (or something along those lines).

I'd be willing to bet that Seattle and Toronto are both following the Minnesota model: 2 separate events, in close proximity to each other.