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New and existing X-ray, UBVJHKsW(1-4), and spectroscopic observations wereanalyzed to constrain fundamental parameters for M25, NGC 7790, and dust alongtheir sight-lines. The star clusters are of particular importance given theyhost the classical Cepheids U Sgr, CF Cas, and the visual binary Cepheids CEaand CEb Cas. Precise results from the multiband analysis, in tandem with acomprehensive determination of the Cepheids' period evolution (dP/dt) from ~140years of observations, helped resolve concerns raised regarding the clustersand their key Cepheid constituents. Specifically, distances derived for membersof M25 and NGC 7790 are 630+-25 pc and 3.40+-0.15 kpc, respectively.

Anchors for the Cosmic Distance Scale: the Cepheids U Sgr, CF Cas and CEab Cas