Regretfully due to the guest count, Plus one's will not be given out to everyone.
Yes, but please look closely at your invitation for the number guests invited on your invitation. That will indicate the number of guests who are invited.
Semi -formal can be anywhere from a cocktail dress to a gown or a button down shirt and slacks to a suit. Wear whatever makes you comfortable and don't forget your dancing shoes!
Yes, however we would prefer an unplugged ceremony. The photographer will be capturing memories throughout the ceremony that you will be able to view at a later time. During the reception feel free to capture memories of the night.