Lake Eyre is in fact the combination of two lakes joined together by a narrow passage named Goyder Channel. The two lakes have a total area of 9700 km2: a real inland sea - except it's most of the time reduced to a white salt crust ! It only filled to near capacity three times in the last 150 years, most recently in 1974. This usually results from heavy rains in Queensland and not from local precipitations.
For us, Lake Eyre will forever be synonymous with flies. Where we camped among the dunes on the lake shore, the flies were so numerous and determined to annoy us that we ended up eating in the car instead of enjoying the lovely sunset. The next day in Marree, we bought all types of fly nets (a large one to eat under, personal ones to wear around the head - that one is great to wash the dishes… somehow flies seem to be attracted by water making the chore into an ordeal!)