The problem with road-side rest areas is that, well, they’re next to a road – and the Nullabor has a steady stream of road-trains 24hrs/day. So, even with earplugs, I didn’t sleep well and woke with the headache. A fistful of ibuprofen did the trick though.
Back in WA time (with no daylight saving) I exited the tent at tweetie-bird time and sunrise, only to find it was still 4:30 fricken AM! I was up, and the other grey nomads were making their noise too so there wasn’t any point trying to go back to sleep.