We have also already had trouble with stubborn fishermen getting in the way and there is currently no legislation that prevents them anchoring right on your best scooping zone.
If I remember correctly, SEQWater closed some of the the dams to boating in SE Qld this season.
You would need to do an inventory of suitable lakes, rivers, dams, bays, etc. You would also need to establish/design. approaches for each that takes into account known hazards (the wires over lake Eildon for example).
Canadair and National Jet did that exercise, See post #42
Study