Just for funsies, I did a size comparison of the "arenas" in Washington. These are just building square footage and does not represent the available amount of floor space (can't tell from Google maps), but gives a good idea of what a venue might handle.

This does NOT account for things like availability, cost, parking, sightlines from the seats, etc. Just an exercise to see what we've got.

-Tacoma Dome (Tacoma) - 24 mats, could probably fit at least 4 more ~296k sq ft.

-Showare Center (Kent) - 8 mats due to hocket floor requirements, could mayyyybe do 10? ~86k sq ft.

-Angel of the Winds (Everett) - almost identical in size to Showare ~86k sq ft, so 8 mats

-Spokane Arena - I was surprised to see it's larger, because I've photo'd multiple basketball state championships there and floor space always feels cramped. ~115k sq ft. Let's say 10 mats or 8 with more seating than Showare or Angel of the Winds

-Sun Dome (Yakima) - 61.5k sq ft. Probably 6 or 8 mats but the seating would be way more cramped.

-Beasley Colosseum (Pullman) - 103k sq ft. Let's say 10 mats.

-Hec Ed at UW (Seattle) - 51k sq ft. Probably 6 mats.

-Climate Pledge Arena (Seattle) - 162k sq ft. I'm guessing 10-12 mats could be feasible with seating to spare.

-Toyota Center (Tri-Cities) - 55k sq ft. Smaller than I was expecting but it does fit a regulation size hockey rink, so I'd guess 8 mats but more cramped seating.

Now, looking at places that do NOT have built-in seating (so low temporary bleachers would have the be utilized):

HUB (Spokane) - 50k sq ft
Clark County Event Center - 101k sq ft (but I'm pretty sure a lot of the inside is smaller rooms) or 69k sq ft in the "barn"
Spokane Convention Center - 115k Sq ft, but in a weird shape. I've heard they've had events there before, so... maybe?

At the end of the day, there's only one building in Washington that can handle 24 mats, the Tacoma Dome. We all know it's old and the seating reconfiguration for concerts makes for extremely awkward sightlines than before.

Realistically, if we split the divisions, we need to be prepared for state championships at high schools, especially in the smaller divisions (1A and B). I don't have the exact costs on hand, but from what I understand, we'd have to rent out three or four of the above venues to meet our needs.

Also, keep in mind that one of the biggest complaints (food cost and not being able to bring your own in) is NOT going to be solved by going to Spokane Arena/Showare/Angel of the Winds/Beasley/Toyota/Sun Dome/Climate Pledge (realistically, we'd never be able to reserve it anyway). All of them do not allow outside food.

Parking either is paid or hard to find at all of those except Showare.

Maybe it will make sense to move, I don't know. I'm just warning that the grass isn't always greener on the other side and I have a distinct feeling that the people complaining now will be complaining just as much if the tournament gets split up.