It's great that this kind of event try to catch mostly the participation of non-nudist people. Even if they had to put that kind of towel, it seems to me that all the people there if not nudists yet, will stay more tuned and give it another and more relaxed try some day soon in a nude beach or so.
And that's what naturism needs, that people try; then, for the most, will be just a matter of time to repeat the joyful of being naked.
Last note, it seems that NUDIE is already a registered brand in Australia (there is a thread about NUDIE in IYNO). Any one knows who is the "owner" of it in Australia ?