What are the usual operating hours for the Westin shuttle to Whaler's Village…

What are the usual operating hours for the Westin shuttle to Whaler's Village and Lahaina? I know the times can vary depending on the season. We're traveling in February. We're renting a car but just wondering if the shuttle is available early for an 8AM Whale watching tour? As well as can we count on it for late dinners say 8PM reservations at Whaler's Village? We're lazy vacationers so we would much rather leave the car parked in the garage and hop on a shuttle. Thank you.