If you know nothing about the Wethersfield Historical Society (http://www.wethhist.org/), you're in for a treat. Established in 1932, the Wethersfield Historical Society is heavily involved in life in the historic district of Wethersfield. They own two historic homes, manage several other properties, house an extensive library, and run lecture series and walking tours within the town.
Most of my contact with the Historical Society has been through the museums and walking tours. The museums are set as period properties, an informative structure for anyone wanting to learn more about the time period and the location. Walking tours are organized around different topics, all featuring aspects of Wethersfield's history. Unless you know Wethersfield inside and out, you're guaranteed to learn something. I'm sure the library collection is equally informative.