How do you sleep at anchor? Do you have total trust and sleep soundly or do you wake up every now and then to check you're not heading off down the Solent?
It's not too bad!! Osborne bay has great holding, and we use the biggest Danforth anchor we can fit in our anchor locker, with 5m of chain. Also, if staying overnight, I normally pay out 6-8X depth scope of rode/chain rather than the usual 4-6X that I'd use if we were just stopping for the day. This way, the chances of slipping/dragging on the anchor are slim.
We put the anchor alarm on such that it goes off when we swing / if anything goes nastily awry, and one of us will pop our head out to check all is well before crawling back into the cuddy. I find I naturally wake once or twice during the night too, and when I do, I tend to go out on deck - out of curiosity more than anything. It is a lovely place to be, even when it's freezing cold. If there's ships moving (especially cruise ships) it's a real treat! Really eerie, but really nice