The drive isn't too bad. It takes 20 - 30 minutes max. The key is to turn left when you exit the Marriott towards Nawiliwili harbor and follow that road all the way back around to the highway. One of the nicest things about the Marriott is that it's centrally located on the island at the bottom of the "U".

The Marriott is great and you can't beat "free", but I agree with the comments about the Hyatt. It's superb.

-David