Relay Race to bring back items that would go in your daybag for a simple hike
Each group gets a sheet with the rucksack on it, they have to put all the correct stuff on their rucksack.
One at a time they run to the other end of the room and bring back an item to put in their rucksack, making sure it is needed for the hike.
Once they have all brought one thing back then you go through their choices and with everyone decide if it would be needed or not.
This can be done with the actual items as well, if you have enough of everything.