Well, in May, you can absolutely get away with Shorts and a Sweatshirt in the morning and a T shirt in the afternoon. For the wedding... please see FAQ #2.
Garden Party Attire. Linen Suits for the gents and light dresses for the ladies. (Flats are recommended due to the reception venue)
Yes - it is in the works. More info to come, shortly.
Yes, there is plenty. Please park on the Eastern Wharf (left) when you enter. The Western Wharf is for boats only.
It will be notated on the addressing of your invitation as your name "and guest" or your significant other's name.