If you end up heading up to Bedford, NH early, LaBelle is a good place to stop and grab a glass of wine prior to the wedding. The vineyard area should be blooming and you may be able to spot a wedding happening!
If you need to burn off some energy, go for a hike at Pulpit Rock - just make sure to save some energy for the dance floor!
If it's hot outside and you need to grab a cold one, check out this brewery in Manchester while you take in the historic city.