Yes, because we love our family and friends.
Semi-formal: Cocktail dresses, jumpsuits, suits and ties, etc. Like you're dressing for a fancy dinner; because you are.
Yes, there is a small parking lot with around 40 spaces (some reserved) and street parking right next to the venue. The trolley will pick up guests from the designated hotels at 3:30pm-4:10pm and take you to and from the venue. End of the night trolley back to the hotel starts from 8pm-11:30pm. You cannot park your car at the venue overnight.
Yes, if it isn't raining. Bring a sweater or jacket as it may get chilly. If it is raining, the ceremony will be inside.