The groom emailed guests about 10 days ago with a list of recommended sites and restaurants so we could make plans ahead of time and enjoy the weekend away. Since the couple didn't create a wedding Web site I thought his email was a great idea.
While I am an organizer when it comes to trips -- I like to plan the whole thing weeks before we take off -- I haven't had time to really look into happenings around Newport and it turns out it's Restaurant Week. In his email he gave us a list of his top picks and enough notice so we were sure to get a reservation at the spots we wanted to try.
Of course a wedding Web site is great to update your guests on wedding planning information, a friendly email with reminders and information doesn't hurt, and it doesn't cost anything either. I highly recommend putting information together -- especially when guests are traveling to a location -- and sending it to guests ahead of time so they can make plans for meals and activities during non-wedding activity times.