Both of the above were necessary. The tent plus other stuff dried well. Due to lack of engine power I have decided against attempting the 100k to Robe and several 70-80k stages (with minimal availability of water) after that. The downside is more main road work.
I will instead ride through Naracoorte, Padthaway and Keith to get to Meningie and rejoin my planned route to Adelaide.
So, tomorrow, with a new plan and clean laundry, I head off to Naracoorte.