Man, that hurts! The Bay Course at Kapalua is not without merit. The holes on the water are beautiful, and overall the course is fun. I didn't care as much for the Village Course, although I understand they've done some work on it since I've played it.
I second the suggestion to go to Lanai and play the Challenge. Absolutely awesome. The Makena courses are also fun. Unfortunately, they're a haul from Kapalua (scenic drive, though).
Take a pass on the courses at Kannapali, but go tropo on the deck at Leilani's there. Snorkeling at Black Rock is also pretty good. Breakfast on the patio at Napili Shores Hotel (just below Kapalua). And be sure to take in a sunset or two in one of the fine waterside establishments in Lahaina.
Finally, if you make the trek to Hana (highly recommended) be sure to top it off by hiking the two-miles up Oheo Gulch. The bamboo forest is wild, and the waterfall at the top of the trail is awesome. Sliding Sands trail in the crater of Haleakela is another stunning walk.
Missing the Plantation blows. But don't worry, there's much more to Maui than the golf.
TOM