when they are arriving by canoe (at her/his place)

when you [plural] are arriving by canoe (at her/his place)

when s/he is arriving by canoe (at her/his place)

when I am arriving by canoe (at her/his place)

when we (but not you) are arriving by canoe (at her/his place)

when we (you and I) are arriving by canoe (at her/his place)

when you are arriving by canoe (at her/his place)