The Barbout Collection has indicies for "Glastonbury"; the familysearch location hints also shows "Glastonbury". I was sourcing a profile in which a marriage was entered in the town records of both Glastonbury and Rocky Hill. (more about that later). I did quite a bit of noodling around and discovered that Glastonbury's original - and official - name from its 1692 founding until 1785 was "Glassenberry". From 1785 until 1870 its official name was Glastenbury. It became Glastonbury only in 1870. Should we be using these names for the appropriate time periods, or am I splitting hairs and Glastonbury is satisfactory for its entire history?
As for Rocky Hill, well it was part of Wethersfield until the township was formed in 1843. The profiles I was working on had entries in Barbour's Rocky Hill volume from the 1700s, though. It seems that the area that became Rocky Hill became a separate ecclesiastical division of Wethersford circa 1720, that was called Stepney Parish, having, I presume, its own church. The entries in "Rocky Hill" are for the marriage and baptism of some of the children which leads me to believe church records may have contributed to the Rocky Hill town records. The records for my profile's children in the Glastonbury town records give birth dates rather than baptismal dates.
Here is what is interesting about this profile's family: they have records in both places, even though they were across the Connecticut River from each other which, except for the ferry (still in operation today!) that began in 1665, it was a 13 mile trek from one place to the other. I can imagine them going to church using the ferry, but not in winter (I imagine the ferry did not operate then - it is closed now for the winter season). Why attend there at all, when there was a perfectly good church in Glastonbury. (Ancestry has church records indicating Appleton was quite involved in the Glastonbury church for more than 20 years).