How about we split the baby. Have 1 tag for "research" and 1 tag for "methodology."
Genealogical research is problem solving in one form or another. Although each problem may have idiosyncrasies, we also engage in more common approaches to problem solving and so methodologies emerge. In my experience, research methodologies are prevalent in genealogy. If you were trying to solve a genealogical problem that involved a post-Civil War African American family in the south, you would use probably seek out expert methodologies that are different than those researching the genealogy of a Revolutionary War patriot in New England.
Maybe go for "research records" and "research process"? I think it's important to differentiate between 'Where can I look for X?' and 'How do I carry out high-quality research?' especially if we want to attract and retain a broad range of expertise.
[Moving a comment into an answer, as suggested by @Jeni.]