Garden party/cocktail attire, the venue is unpaved so we'd recommend leaving heels at home.
The ceremony will be outdoors and the reception will be in a tent.
Early September is one of the nicest times of year in the PNW, we re-toured the venue at the one year out mark and it was mostly sunny and warm.
Yes!
Yes!
If "and guest" or your plus-one's name is written on your wedding invitation, you may.
Beer, wine, and signature cocktail/mocktail will be available.
There is not; there are hotels in the area as well as Vrbo and AirB&B.