There's a lot of variety to Hawaii, more than the palm trees, beaches and cocktails that the holiday brochures advertise. Internal flights between islands are fairly cheap with local operator Hawaiian Airlines and there's little excuse not to explore all that Hawaii has to offer.
We would have liked to have done more, specifically Kauai (kayaking its famous Nā Pali coastline) and seeing the natural beauty of Molokai, but time and budget didn't permit. A helicopter ride over the famous towering sea cliffs would also have been a treat, but there's only so far the wallet can be stretched.