This is the route that LD mapped out. I think its provisional for people to decide if they can deal with it.
Upload it to bikehike.co.uk - OS mapping is down currently though - or do with the TCX(in a zip file) as you would normally do if you already know what you're doing.
Currently looking at 58 miles, 9700ft of climb (and descent!). Seems like it will be a long day, but since I guess most of us will be there for the friday night and saturday night we have the whole day.
If you need a GPX file convert it using GPSBabel (Im in a rush atm and mind failed).