Regarding PLB etc, Best to consider carrying two PLB's (don't want your one to be U/S or damaged when needed, practical backup) Water (plenty) in multiple containers (guard against a leak and can help stowage), some food, first aid kit, light full cover clothing and foot ware. (Even a boat 'V' sheet - orange can be helpful to aide detection - cheap and light.) These are my go to items for outback trips. Also a handheld VHF radio will be helpful.