I've personally used the airport shuttles to various hotels many times, and never had a problem. Our guests have used them hundreds of times, never had an incident. It's perfectly fine and safe to take the shuttle to the hotel. Most of the airport hotels have free shuttles that pick up every half an hour from the bus terminal.
To find the bus terminal, follow the signs to bus terminal / car rental which is out the main doors, across the street, and then walk between the car rental building and the intercontinental hotel to the back of the intercontinental. The terminal is here. Look out for the hotel logo on the side of the minivan when it pulls into the parking lot. There is a waiting area with seats and toilets nearby. Attendants are on hand to direct you to the correct bus.
On your way there you may be approached by people offering to help with your trolley or luggage, or to show you to the bus terminal, or offer you a taxi ride to your hotel. Simply decline firmly but politely with "no thank you, I'm fine".
Happy travels!
Onne from Wild Wings Safaris