I've never had this kind of trips when I grew up, so I can't quite image how things are organised and what it is like in terms of packing the essentials.
Their(primary) school has provided a list of things to take with the top note saying "Large Holdall/ Rucksack with all of your clothes inside and small rucksack for daytime activities."
He will have to take sleeping bag and outdoor mat along with all sorts of clothes (fleece and waterproof and two pairs of shoes).
I just realised that I've binned my old large rucksack last autumn thinking there's no need for it anytime soon. (We don't have lots of space.)
Do I have to invest buying a new rucksack for this trip or how do people usually manage to pack for this kind of residential trip for their kids?