I'm getting prepared for my Melb -> Perth -> Melb journey. I've got a good sleeping bag, panniers, Ventura pack, and a small tent. Next I need a mattress. I'm considering the self-inflating ones. Anyone have any suggestions? How thick should they be? Most of the smaller ones seem pretty flimsy and I'm not sure how comfortable they would be. They also vary dramatically in price. On a related note, does anyone know about those little things you attach to your vehicle that apparently scare the roos away? I saw them in the camping store. They seem somewhat questionable. Can roos even hear high frequency sound? And I've also been looking at emergency tyre repair kits. Almost all say "not to be used on motorcycle tyres". I'm not sure what to go with. The motorbike shop sold these little rubber worm things that you shove through the hole but they were quite expensive. The same thing at Super Cheap Auto said it shouldn't be used on motorcycles.