I am planning a 10 night, 10 day trip to Hawaii with our 18 and 16 year old sons and husband. We know we want to see the Big Island and Kauai. We heard about the mule ride on Molokai and thought we would try to squeeze in a couple of days for that island too, (we did the mule ride in the Grand Canyon a couple of years ago and loved it!!). Are we trying to do too much? Should we just divide our days between just the 2 islands?