Big Island and Maui, HI Need Help planning

So I’m going crazy trying to plan this honeymoon and could use some help.

We decided the best thing for us would be to stay half out time on Big Island, and the second on Maui. We are only staying 6 days (poor!).

I am having the hardest time finding any activity planning info, we’d like to go to a Luau and hike which we can figure out. But we also want to snorkel and do other unique things but I can’t find much.

Also, my wife has been very clear that we have to have a bathtub in our room, and I can’t seem to find a way to verify that with any hotel!