Pet-friendly: Yes 
Cost: Free 
Facilities: No toilet facilities. Fires allowed. Good 4G reception. 

Camooweal Billabong is a huge free camp on Lake Francis, located in Camooweal, Queensland. There are no facilities. There is plenty of space for a hundred or so caravans. Bird watching is prolific with plenty of Brolgas and other water birds to enjoy. Campfires are allowed. This is a great stop over after Mount Isa on the way to NT. 

Camooweal Billabong