Maralinga is a strip where permission to land must be obtained prior to landing. Landing without permission will mean that your insurance will more than likely be invalid, and you can be charged with trespass.
Dont be a knob and phone while enroute to request permission to land - do some pre flight planning and request in advance (they prefer six weeks notice). Nearest Avgas - YFRT, YNUB, YCDU.
Also be aware that Maralinga is only open for tourists between 1 April and 31 October. At this stage, all meals and accommodation are BYO (and this is dry country, so no alcohol). There may be some Dongas or a bunkhouse to rent in 2017, but you will find out when you make contact for landing permission.
Google Maralinga Tours, that will give you all the phone numbers you need.