We visited on July 25, 2023. Following the information shared by Jay T. (thank you so much). We took a four day tour with Moresby Explorers and reached SG̱ang Gwaay in the afternoon of the second day. We were lucky to have a watchman present at the site, he even sang to us a couple songs on a traditional drum. He made good jokes but he was also defensive and sometimes aggressive (and he admitted to it). He contradicted himself sometimes and admitted that he didn't know much of how things worked in the Haida society (because nobody really knows to this day). 

The only thing that I can add to what Jay T said above is that our guide mentioned that Moresby Explorers is trying this year a two day trip to SG̱ang Gwaay. Considering the distance it would be a major undertaking in a zodiac especially if the weather is anything less than good. But probably the cost would be more accessible. For the two of us flights return Vancouver to Sandspit, two nights in B&B, before and after the tour, plus the four day tour came close to 7000 Canadian dollars and it took 6 days.

The picture shows the only house that you can "visit" there.