To be honest, we've only gone through Kuhului on our way to Iao needle or over to Lahaina,Kaanapali etc. It does have shopping centers etc but probably most people(tourists) go on to the other side of the Island. Your big problem of course is transportation, there is very little of it compared to Oahu. Best option is to rent a car, shuttle to airport to pick it up, there is no parking at the pier but car rental companies will make arrangements for you to park at airport if you are renting overnite. Time to travel to west side of Maui, about 30 to 40 minutes without whale watch stop. It can take longer in periods of heavy traffic, 7-9 am and 4-6 pm. For the most part it's a2-3 lane road, with no passing.