Thanks a lot! It looks like if you go to Selva Falls from Antarctic Beech Picnic Area return then you’ve got a walk back up the hill on the way back.
But then you want see Evans Falls so if you do the walk to Selva from Brindle Creek Picnic Area and return then this might be just about the same time as its all flat…
No one seems to mention going to Swanson falls it must not be worth it… At this stage going on how much time we’ve got I will either do Brindle Creek Picnic area to Selva falls return or go one way from Antarctic Beech picnic area to Brindle Creek Picnic Area and walk back via road… a little bit uphill but better than doing the reverse and walking uphill via the bush 
Was kind of hoping being winter wasn’t going to come across any red bellies haha! Just walked Mt Greville last Sunday and no hint of any snakes there