Hawaii I'm jealous
Sorry no advice for where to rent from me. I have been to the Big Island, Kauai, and Maui. My only advice would be to make sure you bring rain gear.
The Hilo side of the Island gets rain daily, rain forest, so if you are planning to go on that side make sure you are ready for rain. BTW, if you are looking to get away from all the touristy stuff the Hilo side is where it's at. The best side of the island if my opinion.
Motorcycle Farkles so far: Center Stand, Givi V46 top case, Madstad bracket, Caribou Pelican 35L Pannier System, Nelson-Rigg cl-1050 tank bag, Powerlet for the tankbag, Sena SMH10, Vista Cruise Control, GIVI Crash bars, Rick's fork brace, Rick's kickstand foot, Rick's rear wheel spacer, Garmin 550
Wanted: skid plate, PCV, PC-8
All that is gold does not glitter, Not all those who wander are lost -- J.R.R. Tolkien