Hello...I don't know if I can be of any help, but if you are going to Hawaii after November 7th, I might be able too.
My wife and I are going to Hawaii on the Dawn Princess for 9-days, October 27th. We have booked a car on two of the islands. Kauai and Hawaii. We are booked with Thrifty Car rental. We got a great rate and I have used them before.
I can write back with our experience when we get back if that might help.