This treehouse is actually several structures. Upstairs (at entry level) is a bathhouse with washer/dryer, tub, shower and composting toilet (which may be off-putting for some, as it doesn't flush, but if you keep the lid closed it doesn't smell and you get used to it pretty quickly). Down the walkway 20 feet is the upper cabin, with a living area, bedroom (comfy bed but a bit tightly situated in the room) and a oft area with two twins snugged up together. Access is via a very steep ship's ladder, which was fine for the adult guests we had two nights, and probably okay for brave youngsters, but not tiny tots. On the lower level, reached by an outside stairway, is a nice living room with two comfy couches, TV, lots of windows and a deck overlooking the water (to the west). Through a small passage is the decent-sized kitchen, with a large table and more windows and deck.
The cool thing about this place is that you are literally in the trees - maybe 50 feet up - so you are surrounded by these magnificent firs and cedars, looking out over the water. We spent most morning on the deck, drinking coffee and listening to the herons, eagles, geese crows and gulls duke it out in fern cove estuary, about a 1/4 mile down the beach (and yes they can be loud). In the afternoon we'd hang out at the beach, down a trail about 30 feet below. Beautiful spot with a firepit and charcoal grill, small deck over the water.
We really oved the location, but be prepared for a bit of exercise!