none of the bikes got punctures. I had to pull loads of doublegees out of my shoe soles when I got home.
I've ridden around there twice now - once on the Anthem and once on the XTC - and didn't have any issues. It's not like I stuck to paths either. Mind you I think you must attract them because you mentioned once before a venue that had them (I think it was Yokine where Tash set last year) and she didn't encounter any. Maybe everyone had tubeless tyres!