Looking for epic first and last time Hawaii itinerary for mom with early stage Alzheimer’s

Title says it all. I’m planning a 7-9 day trip to Hawaii with my family for my mom. She’s 67 years old with early stage Alzheimer’s. She’s extremely active and fit and is perfectly fine to travel, she just has some short term memory issues and has advancing symptoms. Hawaii is a bucket list trip for her since it will be her 50th state. She’s always chosen more exotic locations and was worried Hawaii would be too crowded and touristy, so I want to show her the exclusive side. I’ve been a few times and would like to curate the perfect itinerary for her and my dad. They are not really a sit around at the resort for 4 days couple but rather a do something adventurous like a boat cave tour and then sunset cocktails.

Background, we are seasoned FAT adventure travelers and my parents have always preferred Nat Geo/Lindblad trips where they are away from crowds, receive VIP treatment, and get to do interesting private nature tours. She likes nature and animals, exclusivity, and water activities like snorkeling. My dad does not like being around kids and is less active (not going to be doing any crazy Kauai hikes but will snorkel). They are foodies as well.

I’m thinking Oahu for a few days so she can see Pearl Harbor (her request), but maybe stay in an Airbnb on the beach in NS. We (the kids) are big surfers so hoping to sneak some surfing time in there.

I’m also thinking Kauai because she wants to see the Napali coast and I think she’d enjoy some kind of private catamaran with lunch and snorkel/beach option. I’m considering Lanai but wondering if they’ll get bored?

Would love any and all recs.