Not sure if you need suggestions, but Montserrat, where Sir George Martin's legendary Air Studios used to be is a beautiful, safe, remote, and very private island - with very decent rock 'n' roll history (look it up).  I went there a couple of times last year and Sir George's house can be booked as a small hotel if you know who to ask. For more capacity, there are loads of villas to rent - all with pools, and it's possible to swing a pukka reception at the Governor's residence, if you know how (it's British Territory and the Foreign Office chaps there are bored and helpful).  We hired Sir George's place for a project and used it as a recording studio, it's accessible by 6-seater prop-plane - or helicopter - from Antigua.

A live volcano makes it an interesting chopper ride in, but avoiding the hurricane season is advisable; it's right in the Cape Verde corridor.  Let me know if you're interested.  It's not wild Vegas-style nightlife you just make your own parties. I loved it.