My normal development workflow doesn't use that many different Emacs packages. With a few exceptions I've mainly worked with a "stock" Emacs distribution and augmented that with a few select Emacs packages that I downloaded manually. It worked for me for a decade or so, and it made it reasonable easy to move configurations between machines - zip & copy was my friend for that, although I've since changed that to using dropbox.
Ah, a meta blogging post. Sorry, I try to keep these to a minimum...
The Gnu Emacs for Windows distribution appears to be pretty good at inferring where a reasonable place for $HOME is, straight out of the box. In my case, said reasonable place was %USERPROFILE%/AppData/Roaming which was an entirely acceptable default.
Throwing caution into the wind this morning, I'm having an updatefest only a few hours after the software was released:
As VS2012's C++ compiler doesn't support "true" variadic templates, the new runtime library classes that use variadic templates are implemented using macro magic behind the scenes. In order to get the "variadic" templates to accept more than the default of five parameters, you'll have to set _VARIADIC_MAX to the desired maximum number of parameters (between five and ten).