You must be confused, or perhaps you’re not talking about the same species that I am thinking about. Huckleberries, genus Gaylussacia, are definitely in the same family as blueberries, Vaccinium. They’re both Ericaceae, in the subfamily Vaccinioides. Gaylussacia is definitely not in Solanaceae.

Two species of blueberry as well as cranberry grow natively in a few bog habitats near my home, and huckleberries are also sympatric with these species.