As someone who’s island camped a few times over the years and as recently as September last year on the Blaskets with the RIB at anchor off a beach, these guys woke up to the nightmare that means I never really get a great nights sleep!
I found it riveting to watch, not least because of the cost Implications in that part of the world that drove a lot of their decision making. The relatively benign weather played a part too as hypothermia never entered into it. Worth a look if you have an hour to spare but it’ll make you feel lucky for the services we have here, RNLI, Coastguard, etc.
They used a stern and bow anchor. I just go for a single CQR but I secure to to the bow eye to reduce the vertical pull on the anchor. Then make sure it’s really set with a lot of rode out and hope it’ll reset ok each time the wind and tide change. I carry a second anchor and am often tempted to use a stern one but I feel with the wind usually shifting a lot and tide swinging and quite strong, a stern anchor would add more risk than security.