OK ... so ... I've never attempted anything of this length before. I've done a fair few shorter rides, and a handful of 300-odd rides. I'm used to riding in the "challenging" conditions of the Outer Hebrides, so the weather doesn't really scare me. Just wondering if I'd be daft signing up for something like this, or is it just the new year gin talking that's saying go for it, it'll be fun ... ?