First time visitor to this site, and in August, first time visitor to islands! We're definitely going to Honolulu for a conference - have booked in conference hotel, a Sheraton on Waikiki beach, I believe. Questions:

-If we have time to go to one more island, which is best choice? My husband wants big island (volcanoes) - if we do choose that, where is the best place to stay - not too expensive, but still nice.
-We're going to rent and ride a Harley for part of our trip - any suggestions on that idea?

Any other advice on great restaurants, etc. would be very much appreciated!

Thx,
carolekv