I figured it wouldn't hurt to cover another of the major towns in Connecticut's "quiet corner." Plainfield, CT was founded in 1699. Currently, according to GenWeb, the town has 14000 residents spread across four villages. Like many small towns, it has recent history of manufacturing.
The First Congregational Church of Plainfield was founded in 1705. According to the blog Historic Buildings of Connecticut, the current and fourth church dates from 1819. Some of the church's records are available online. Others can be researched at the Connecticut State Library, as the church was included in the State's slip index. The church can be reached through the information posted on their website.