In reply to Rog Wilko:
Thought you might get a few more suggestions, other highlights we think....
Juliets Gardsn restaurant, on St Mary's.
Hire bikes on St Mary's and visit some lovely gardens and beaches on the way around the island. Lazy version, book one of the Carts which are basically big golf buggies. Great fun.
Bryher, walk around the island, swim on the W side and drink lovely beer at the very nice Hell Bay Hotel. Also on Bryher, Island Fish Co cafe, just up from the boat landing. Best (only!) lobster and wedges I've ever had.
Have a great time. We are back this year and after I was one of the 41% who didn't finish the Scilly60 race, I'm in the fun run Scilly60% this year. Can't wait!