Hawaii Vacation rental
Golf
Swim with the Dolphins
Snorkeling
Surfing
Sunset Cruises
Fishing
Swim with a Manta Ray
Horseback Riding
ATV Tours
http://volcano.wr.usgs.gov/hvostatus.php
www.nps.gov/havo/siteindex.htm
see beautiful Lake Tahoe and stay at:

This site will give you a month by month idea of some of the events happening on the Big Island of Hawaii:
Hawaii Vacation rental