Everything is *very* close to the airport, so you do not need to rent a car! We recommend you fly in and out of Boston Logan Airport (BOS) and take a 10-minute Uber or taxi ride to the hotel. The hotel is a 5min walk from the church and a 2min walk from the reception venue

We've reserved a block of rooms at the Courtyard Marriott North Station because it's centrally located and a short walk from the wedding and reception venue. If you want to stay farther out then there's a subway station nearby that runs for the duration of the event.

I googled it for you: 'Cocktail attire is a balance between formal and casual and elegant and comfortable. To an event with this dress code, such as a wedding, men typically wear a suit and tie while women wear a floor-length or midi cocktail dress.'