Looks a bit dry on the Google earth Map but I guess thats not the case this season. These grasshoppers mulitply after good rains. Are you visiting that new NP - lucky you.
Yes! The Bulloo overflow was totally full when Ned and I visited, super impressive to see so much water in an otherwise arid landscape. Lot's of Crinium, Senecio, Swainsona as well as plenty of wetland birds.
Not Perelytrana as outside range. P. rana black soil SW plains NSW -see 468603 P. sp #1. black soil plains NW NSW (not far west) - no records on CNM although very common.