Hygiene products.
Basic medical supplies.
Basic tool kit.
Spare inner tube x2.
Tire repair kit x2.
Emergency ration pack x2.
Water bottles.
Water purification tablets.
Relevant maps.
Spare clothes.
Pocket knife.

If you are survival savvy you can find food on your venture. Bring a small fishing rod perhaps. Or fishing line and a hook for a make shift stick rod.

All that can fit in a small lightweight backpack.