Semi-formal. What does that mean? Men: Khakis or dress pants with a button down Women: Khakis or dress pants with a blouse, Dresses knee high or lower
Men will be in black and women will be in maroon.
If your are given a plus one on your invite and when you RSVP, then yes!
October can be very unpredictable. Can be as warm as 80 degrees to as low as 45 degrees. Ceremony will be outside if the weather allows.