Our chapter webmaster happened to be an alumna, so we would send all our information to her through email to let her know what was new with the chapter and ideas to put on the site, and then when she'd come visit for Homecoming and other events we'd provide her with some pictures to go on the site, as well.
I agree with HBADPi, I think working with the PR team (which I think is with RVP, right?) would probably be the *best* place for the webmistress to work with/report to. The website is another great PR tool to use for recruitment and such, so that would probably make the most sense to me