haven't been to kaui in 20 year, but go to maui almost every year. some of our favorites:
Restaurants:
Roy’s- Kahana (there are two next to each other…..Nicolina’s is more formal- same menu)
ios
pacific'o
Kimo’s- lahaina (trendy, but still ok)
Tropica- Kaanapali (at the westin) oceanside.
Hula Grill- Kaanapali (good place for lunch and app’s around sunset)
Mama’s fish House
Moose’s- in Lahaina. Good for happy hour….. $2.00 maitai’s,etc.
aloha mixed plate- GREAT Lunch place.... we prob hit it 3-4 times on our trips
maui tacos makes for a nice lunch as well
sansei- kapalua also
Merriman’s Pineapple Grill
a lot of other great restaurants all over the island.
Activities:
Chocolate & champagne sunset cruise (scotch mist)- it’s on a small sailboat (holds about 8 instead of 80)
Scuba- there are some good sights near lanai. Hawaiian rafting adventures was very good. We’ve seen dolphins along the way…they let us get out and snorkel with them…also have seen whales on the ride over.
Snorkeling- you can go with a group (i used to like the catamaran booze cruises that had snorkeling). Some good spots if you just want to go on your own: Honolua Bay, black rock, and mile marker 14.
Kayaking
luau- feast of lele is pretty good
Haleakula- sunrise at the top of a large cater, then bike downhill for 7+miles……
Helicopter rides
The Road to Hana- it’s long!!! Nice waterfalls along the way. With a little hiking you can find some cascades (pools). there is not much in hana.
there is a winery on the island... not the best wine, but still fun.
there are some decent micro breweries.
renting jet skis
surf lessons (if you don't know how)
windsurfing
whale watching (when they are migrating)