Could use some assistance from those in the know 
Going to Hawaii - will be going for about 14 days and going to these islands:
Kauai
Hawaii
Oahu
We are probably going to rent a 4x4 Jeep in Kauai - but maybe in Hawaii as well. I'm hoping to get to some interesting places so I'm curious if this will be helpful or is it not really needed? A book we've been given suggests 4WD for Kauai. I don't want the extra expense if it's not necessary though. Any info appreciated. Thanks!



