Boathouse was as described, nice cabin with two upstairs rooms. Generally you feel right at home, even a wine selection with an honour system. boathouse is about 50 meters from the main house, wifi comes from there so only works at front edge of house (as described).
The only issue I had was with the house being described as dog friendly, realistically it's more like dogs allowed. The description says no dogs on furniture and bedrooms, which is standard, and describes a porch area for the dogs.
However the rules in the house say dogs are never allowed in the main part of house and must stay in a 5ft x 4ft porch area. It might be suitable for outdoor dogs but my indoor dogs cannot remain in an area like this for a weekend. I always book dog friendly accommodation and I would expect the dogs to be allowed in their beds in the same living room area as us.
Overall cabin was nice but not really dog friendly.