G'day chiki26,
Welcome to the forum, Its not unusual to have solo walkers on the Overland as it is usual that you will link up with others even b4 you get to Waterfall Valley.
Ditching the Tent at any time is not prudent unless you are useing a Bivvy Bag because you will always have the what if factor and I believe we were getting some Snow up there in the last couple of days.
To lighten you load check and double check that you wont be taking too many clothes(dry gear at night and put wet/damp stuff back on in the morning

) its better to hang you wet/damp clothes under the Hut verandas than to attempt to dry over heaters . Also consider your food intake ,if you can afford them the freeze dried meals that just require boiling water are well balanced and light as.
Tasadam has a thread on this site where his wife did the Overland and the food requirements are set out in some detail (I suspect you will get directed to it soon) hope this helps and enjoy the trip.
corvus