Kakadu is a big place -- about 200km (124 miles) long by 100km (62 miles) wide -- so plan to spend at least a night. Day trips are available from Darwin, but it's too far and too big to see much in a day.
Most major attractions are accessible in a two-wheel-drive vehicle on sealed (paved) roads, but a four-wheel-drive vehicle allows you to get to more falls, water holes, and campsites. Car-rental companies will not permit you to take two-wheel-drive vehicles on unpaved roads. Territory Thrifty (tel. 1800/891 125 in Australia or 08/8979 2552) rents cars at the Gagudju Crocodile Holiday Inn, Flinders Street, Jabiru; otherwise, rent a car in Darwin. If you rent a four-wheel-drive in the Wet season (Nov-Apr), always check floodwater levels on all roads at the Bowali Visitor Centre (tel. 08/8938 1120). The Bowali Visitor Centre, many attractions such as Nourlangie and Yellow Water Billabong, and the towns of Jabiru and Cooinda usually stay above the floodwaters year-round.
Facilities are limited. The only town of any size is Jabiru (pop. 1,500), a mining community where you can find banking facilities and a few shops. The only other real settlements are the park's four accommodations houses.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.