I know someone who spent about a month or so there, said it was absolutely epic. All rock reef breaks, boat required. Actually, you need a boat just to sleep on right? Isn't it like no / severely limited access to the islands?
Fly to San Cristobol there you can find a reasonable place to stay . There are at least 4 different breaks within walking distance. Can hire boats for fishing/surfing/snorkeling/scuba. Beautiful place. Intense surfing. Swell didn't seem too consistent. Can take boat tours cheaper from here.