Well... Thank you Nay-DMAX, GGPatrol, Fuji, Lost and ozbogwam.
I am happy to announce that Nay-DMAX is the winner with the $7.92 Big-W hat.

They are cheap, have a wide brim, and the brim is more than strong enough to support fly nets.
Yes, I made the kids try them on in Big-W with the fly nets... I wonder what the other shoppers thought?

).
The Big-W hats even come in a range of sizes (not 'one size fits all') and a range of colours. Each kid has a different size and colour.
I would have never considered going to Big-W for a wide brim camping hat.
Thanks again everyone
