Great spot to get away to! Galiano is quiet and rustic but great for hiking and as a launching point to explore some of the other islands too. Spring to Fall there is a Saturday farm market at Lions Park in Sturdies Bay that, even in 2020 w/ social distancing, was worth a look for the craft booths and local vegetables (and coffee roaster!).
The cabin itself is well-equipped with a woodstove (nice!) or electric heat if you prefer. Good cooking facilities, and a comfortable bed nook with a thick, warm duvet. I stayed here a month in the fall to work (remotely, internet worked well) and really enjoyed it. Woodstove evenings on the sofa when it was cold...patio evenings watching the hummingbirds feeding at the feeder when it was warm enough.
Anywhere on Galiano is less than a 10 minute drive away, except the far northern parts, and I even walked and ran into Sturdies Bay a few times. Some might find specific grocery items unavailable, although there are three small grocery stores in Sturdies that stock the basics and more. If you really need anything specific (especially medications), you should probably bring it with you.