That is dependent on the weather on the day of the wedding. The bride gets to make that decision by 9am on the big day.
No. The ceremony itself will be, at the most, 30 minutes long. If you need extra protection from the sun, then bring a hat.
No. The parking lot is very close to the venue though.
No. It is strictly against the wedding venue's contract that we DO NOT bring any outside alcohol to the wedding.