1. Something like the Kendrick Traction Device is a godsend in a jump bag (link
here). It‘s made by the same manufacturer as the KED. It‘s a small, lightweight traction splint that‘s far easier to use than the conventional traction splints, and can be carried easily in a jump bag.
2. An adjustable C-collar
3. Head lamps (a simple, LED head light makes foot parades at night far simpler)
4. Emergency solar blankets (the small, fold-up aluminium kind)
5. A small, lightweight, folding collapsible stretcher is very nice to have on exes where weight is a big consideration
6. A jumpbag that has lots of pouches, is waterproof, and has shoulder straps that don‘t tear or break at the first sign of use
7. Emergency SAS rations (the uber-powerbars - a meal worth of protein carbs and nutrition in a single bar). Great for the kids who don‘t eat and drink and thunder in.
8. Feminine hygeine products... they always seem to come in handy.
9. Waterless hand sanitizer
That‘s about the best I can think of, for now.