Grampians camping safety

Hi,
I am thinking of doing a trip to the Grampians and camping in one of the campgrounds run by Parks VIC (once we are allowed of course)
My husband is a bit worried about leaving stuff there and then doing long day hikes. I can't imagine someone would seriously seal a tent or a mattress... obviously we would leave valuables like computers etc in a locked car.
Has anyone had experience/advice about this sort of thing? We've only ever camped in caravan parks/similar or places where we have been with our gear the whole time - never left it in a more "remote" setting like the campgrounds run by Vic Parks.
Thanks in advance! Our hiking dreams are keeping us sane at the moment

I am thinking of doing a trip to the Grampians and camping in one of the campgrounds run by Parks VIC (once we are allowed of course)
My husband is a bit worried about leaving stuff there and then doing long day hikes. I can't imagine someone would seriously seal a tent or a mattress... obviously we would leave valuables like computers etc in a locked car.
Has anyone had experience/advice about this sort of thing? We've only ever camped in caravan parks/similar or places where we have been with our gear the whole time - never left it in a more "remote" setting like the campgrounds run by Vic Parks.
Thanks in advance! Our hiking dreams are keeping us sane at the moment


