Perhaps this is a preference thing, but looking for “best practices.” If I create one or more macros for internal use, using the procedure of creating a page for the macro and attaching the code and parameter objects, where is the “best” place to store that page (or set of pages)? Someplace where they’re not intrusive or over-obvious in the document tree.
Just looking for what people do for this, that works out for them. Responses or links appreciated.
-Alan
See https://dev.xwiki.org/xwiki/bin/view/Community/ApplicationDevelopmentBestPractices
However you won’t find any best practices for Macro locations.
However, we (the XWiki Dev Team) often put them in the “Macros” space (and yes we need to add this to the doc above). Unless they’re part of an application in which case they’re put in that application’s space.
Now I’m not sure I’d recommend you use the same “Macros” location since you would mix your macros with the ones provided by the XWiki Dev Team 
You can pick any place. Just make the pages hidden so that they don’t appear in the Nav trees and searches by default.