I did it! I made a Wingo!
W5 - Has been in HSKS before - Siobhan Mooney
I5 - Has been on a multi-day camping or backpacking trip - Hermione Bagnold (The Sand Dunes)
N5 - Plays a musical instrument - Ambyr Phoenixfyre (flute and percussion)
G5 - Has the same birth month - Kitkatherine [don't know HP name] (November)
O5 - Brought a pet to summer camp - Celestina Pettigrew (Owl)