Thanks for the kind words and encouragement guys, much appreciated.
It seemed a good idea when we booked it last summer - a group of us all wanting a bit of adventure as we approach 50. As is so often the case it then grew a life of it's own and (having paid all the costs ourselves) turned it into a charity fundraising venture, too. We've now raised over £12k for four different charities so even if we fail to reach the top there's a positive slant.
I'll post some piccies in about a fortnight!