Repair kit, as well as a first aid kit, better to have in each campaign. However, for small groups on the number departing on Sunday out, repair kit may be the smallest: gum, a few British pins, sewing kit — this is perhaps all that is possible to do. If the group is large, you should bring a formidable thread with thick needles and awl: quite often the case that any of the tourists are broken strap backpack.
For longer hikes repair kit increases. There should already have spare buttons of different sizes (in the one-day campaign to tear a button you can change the British pin), small pliers or tongs (in case you need to repair shoes), darning, 8-10 meters herringbone tape, it may, if necessary to change the tent quickdraw , a rope in neck backpack, shoes laces, adhesive for patches on clothes, pieces of fabric for the same patches, scissors, adhesive tape reel wide or small roll of adhesive tape, and about a meter thick wire for various fixes.
In many campaigns also useful to have a triangular ratfil and bar straightening axes.