Hello ForsakenFalcon,
Not a worry if you can't make it, I don't want to push you, as I suffer from severe depression myself, and sometimes is a struggle to do anything at times.
But if you could make it, that would be fantastic.
As for not wearing a tee-shirt, that's fine. Its optional only, but does make it easier to know who's who when we first meet.
Take care my friend.
Best regards,
John
DarkMatter