It was actually a full house for about 30 seconds right when I unplugged at 5:00pm.
I would estimate that around half of nearby Tesla owners aren't even aware that this supercharger exists yet. It seems obvious to all of us on the forum, but most Tesla owners don't participate in any Tesla forums so they won't discover the location until they randomly notice it in the Nav.
So I definitely think this will be a crowded location in the near term before other nearby locations are built and opened, especially on Sundays between Thanksgiving and Christmas. In the immediate future North Bend and possibly Tumwater will help some. I haven't seen any indication of any supercharger activity in Tacoma.
This is, by the way, one major problem with shopping mall superchargers. Locals will want to charge while they shop on the weekend and road trippers will also want to charge on the weekend (especially Friday and Sunday). There will even be some local apartment dwellers who may choose to fill up for the week on the weekend with Sunday being the most likely choice. So I can really see Sunday afternoon/early evening being quite busy here. Unfortunately Tesla owners don't seem to exhibit much flexibility in their supercharging times. They just seem to want to charge when they want to charge with little regard for when the supercharger might be busy or for staying out of the way of people who may need the supercharger more than they do.