You know, I've been dreaming about doing the very same thing once I get my wings.
Landing on the salt would be a blast but whether you'd get permission from the indigenous owners and the DLRA is the question.. The condition of the salt varies from year to year. Sometimes it's too wet and the event is cancelled. But if it's OK to race on, it would be OK to land on... (Spectators are allowed to drive their vehicles on the salt to get to the starting line and the pits).
The DLRA camp (on the lake's edge) is on land owned Mt Ive homestead which has a strip. It's about 34kms from the DLRA camp. You could possibly hitch a ride in each day as some speed week people stay there.
Or for bush planes there might be a suitably clear area close to camp - it's desert after all..
Has anybody explored these options? I can talk to the DLRA about it..