Many campers consider rainwater and toilets a bare minimum at campgrounds and luckily Australia is full of those. Here are 4 campgrounds we found near Diamantina Lakes, QLD which have toilets and rainwater. No need to bring a shovel this time (although do bring toilet paper - campgrounds aren't always stocked).
#4 Georgina Catchment Info & Rest Area
Kennedy Developmental Rd, Middleton, Queensland Get directions- ✓ Pets Allowed
 - ✓ Free
 - ✓ Toilets
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Water (Non Drinking)
 
#3 Hamilton Hotel
Min Min, Queensland Get directions- ✓ Pets Allowed
 - ✓ Free
 - ✓ Toilets
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Phone Reception
 - ✓ Water (Non Drinking)
 - ✓ Allows fires
 - ✓ Telstra 4G
 
#2 Monkira Rest Area
, Queensland Get directions- ✓ Pets Allowed
 - ✓ Free
 - ✓ Toilets
 - ✓ Caravans
 - ✓ Camper Trailers
 - ✓ Dump Spot
 - ✓ Water (Non Drinking)
 
#1 Gum Hole Camping Area
Diamantina National Park, Queensland Get directions- ✓ Toilets
 - ✓ Camper Trailers
 - ✓ Water (Non Drinking)