Walking Sticks . I've found that only the very young, the very strong and the very graceful don't do better with some sort of walking stick. I used to carry a big military pig-sticker. Now I carry a small lockblade and one of those cool multi-tools with which one could conceivably rebuild western civilization following a nuclear holocaust. The pliers function of those multitools is particularly useful.
Some cord seems to always come in handy.
A good long length of heavy twine or equivalent makes a good clothesline, a medium length of medium-weight line is useful for hanging groceries away from critters and, when pooled from the group to make a longer line, can be useful for bigger, unpredictable needs. A small sewing kit comes in handy for unforseen gear repairs, although everyone on a trip doesn't need to pack one. I also carry a couple of caribiners and extra strap fasteners as general purpose attachment tools. Camp Stool . I have a small, extremely light folding stool that nests down into my main pack bag.