In reply to Sean Kelly:
As above really. You could bike to the bothy, but as half of the joy of biking part of the way is an easy downhill return, which you won't get, I'm not sure it would be worth it. The ride would be flat, but with enough gravelly or rough sections to be quite annoying on the return when knackered.
The slabs are an amazing, unique place, well worth visiting. The scrambly bit looks rather impressive, but apparently is fairly straightforward. In winter, it looked anything but and we avoided it by climbing up the corrie.