While you should make every effort to keep loads light, each rider should have a tire pump aboard.
Mirrors are essential for safe travel on public roads.
Be Prepared and bring along everything you might possibly need. It s not so great, however, to haul it up every hill or even from the luggage truck to the campsite. I find I can carry most everything I really need along the route in this series of plastic, zipper locking bags in my seat wedge. Wire can be used to get lights working or to patch up a broken joint. Duct tape can fix almost anything.