We will arrive in Maui on Wednesday, spend a good 4 days there. Staying at Kauhale Makai, in Kihei. I have read many posts but just don't know how to best spend our time. From there we are going to Oahu for another 4 days. We are a young couple and want to snorkel, do zipline ,a laui and see whales and site see....what are the top things to do? This is our first time in Hawaii. Thank you so much for your time.