It's a nice run and truly lovely destination,when the weather is suitable.
Not sure about Gig Race Time...although we had a very "interesting" visit a couple of years ago when all the Girls teams met up for an end of season Pxxs up!...loads of Amazonian types all doin thier best to Drink the Isalnds Dry and out shock each other!!
Topless "Rib Hikers"were a new one to me!
The South Coast jump off/recovery is A lot less demanding!
Penzance is easy and launch most states...although parking is a bit of a hassle...and best to notify in advance...
As said there are plenty of Moorings once there although a Tender is really Handy!...especially for the smaller Islands.On a our last trip this year (a week in Sept) our group hired a Tender from the Boat yard on Bryher for just a few quid... Good option which means you don't have to carry one across
St Martins has Pontoons which make life easy...all states except dead low on Big Springs.
The Harbour Master for Tresco mooring hire (and Bryher ) is called Henry and can be contacted on 07778 601237.
Schooners Hotel/B&B is a good option and cheap for a stay on St Martins...(rare combo on the Scillies!!)
Tresco and Bhryer both good for Camping...St Agness nice pub and grub.
Take it easy navigating between the Islands keeping a keen eye on you Depth Guage/Plotter and you'll be fine.
Plenty of good Vids on the Scillies on the Forum which may well worth a look.
Have a good one,and post some pics!