Cheers bwizz, we hope to be up there soon again. Heartening to see that it isn't sealed off like some others up there.
I guess the water keeps most out, but you always get dry again don't you. I've heard that the farmer isn't (understandably) too keen on people poking around.
Having had a look from the other end I think a through connection is perfectly possible, just depends how long you can spend looking for it.
Thanks for the pics.