I answered that we regroup at portages. Our idea is to paddle together keeping all canoes within sight. But, given bays, islands, points, etc, we occasionally lose sight. But we all have maps, and at least one seasoned paddler in each canoe. Our agreement is to meet at the portage and regroup there. It is ok for wheover gets there first to go ahead and portage, so the trail does not get clogged. But no one leaves until everyone is over the portage.