Recently completed a tour of the Cairngorms. 4 of us rode the 200km trip in 2 and a half days carrying tents, stoves, sleeping bags etc. It was great fun - but I pulled the ligaments in my left knee during the second day and had to ride the rest of the route in agony! Still it was an amazing ride - photos are here: http://www.clansharrock.co.uk/gallery/view_album.php?set_albumName=album37 Thanks go to Alistair, Tony and Neil for making the trip what it was.
We are looking at potentially repeating the trip again and just doing it in 25 hours - but with minimum gear to carry.
Next big trip should be the English C2C however. Hopefully in 4 days.