Some good advice above. It feels to me that, given you’re remoteness, you can’t ignore dependencies on other local businesses as channels to market. Tourism will eventually crawl back (domestic and then inbound) so the question really is how do you: a) reduce costs and preserve cashflow as best as possible to survive in the interim; and b) set yourself up for an optimal recovery.
On cost reduction/preserving cashflow: Get across what’s being offered by the Govt in terms of subsidies and loans (you may or may not qualify); look at your expenses line-by-line and see what you can reduce, differ, or negotiate a better deal on. Overheads like utilities and rates are a good place to start.
On setting yourself up for best possible recovery: I’d make sure you’re plugged in to other tourism providers in the Queen Charlotte tourism eco-system. I’m sure you have local networks (Facebook, Whatsapp groups etc.) of other businesses in the Sounds. Is there more you can do to band together and collaborate on what an “optimal recovery” looks like for Queen Charlotte Sounds and how you might jointly execute. I’d also include the RTO in this – I’m sure they’re thinking along the same lines.