gramps,
I did not see the minisuites, however the rooms are very nice on this ship, gennerally speaking, larger than modern ships our room was 190 sq ft. the bathroom has a large enough shower for 2 adults. I took someone elses advice and requested 'eggcrate' mattress pad this made the bed more comfortable.
We did not take tours, however, our new found friends did. They cost more than do it yourself, but ship won't leave without you! Tours generally run 40-50% more than do-it your-self tours. We had torental rains in Honoulu , tours left, got flooded out from rain... Princess gave complete refunds on all those trips.
Rental cars were about 40.00 a day ,economy car, we got free upgrades on Kona and Kauai to converables!. this is my recommendation. Read the tour book carefully, and rent a car -ask the rental agency where these places are and go
Helecopters tours ,while pricey, are probably the best way to see the islands.
The islands are gorgous, and we live in San Diego Ca, never been before, but we will go back!! -Ron