yeah I've had a look around the respective parks websites. nothing official that I can see.
some of the backpacker forums have quite animated discussions from hammock campers and those that believe hammocks are damaging. that's a great website though, maybe I'll direct them there. Thanks!
In Tassie, I have only ever been met by curious questions from the rangers and fellow campers alike. I say go for it, prepare yourself with some knowledge about LNT incase you get asked and plead ignorance if someone tells you to move on. It's worth it!
Bookmarks