TBH I doubt there are any left, stories like this aren't uncommon, and the one thing they all have in common is that they never find the animal in question. We've got a couple of similar stories with moose supporsedly living in Fiordland, and Moa (our native ostrich-like bird) being occasionally spotted somewhere just as the person never has their camera ready...
I love this topic and have done a lot of reading on it. I do think they there very well may be some left in the Tasmanian forests. I know that the last confirmed living one was in 1936, but we have reports of verified tracks from the late 1970's, showing that they at least existed until then.
Its certainly sad. I hope there are thylacine left, and it doesn't seem entirely impossible. While I doubt there are moa left, I could imagine something small like thylacine surviving in remote areas. Sort of like the ivory-billed woodpecker.