In reply to wolfy1987:
On mixed routed in the Lakes or Gorms I often take friends 00 - 2.5 all inclusive and a 3 camalot, on ice routes on the Ben I don't take any, for other stuff it's somewhere in between but typically 0, 0.5, 1.5, 2.5 & 3 camalot. Also carry three hexes - not sure on the size but basically the ones that are bigger than a wall nut 10 placed sideways.