This is not Bennington Co. specific, but your general search for Fullers in Vermont may benefit from my info.

I have Noah Fuller, Jr. m. Lucy Wilson living in Dorset, Bennington Co., VT. Children born in Dorset between 1792 & 1815. Noah died in Dorset 18 Feb 1846. Lucy joined one of the children later in Clarkson, Monroe Co., NY where she died 16 Mar 1865. Both were from Coventry, Tolland Co., CT originally. Lucy is sister to my direct Wilson ancestor.