Ah ha, I had always assumed I could dry out with my Bravo 3 tilted up if the conditions were right and it was a soft/gentle landing with no swell, but must admit, I haven't looked that closely... Thanks for the warning!
I found my little video from last year sailing there (we had a small Avon Redstart to make it count as a SIB trip):
. The Scillies are definitely some of my favourite islands, I hope the weather is as good as forecast for you! Loads of sunbathing seals to see on Menawethan as well, if you do a trip around St Martins.