I've found that using Perl's POD is much easier than writing man pages directly, and you can create a man page from the POD file with the
pod2man utility (part of the base Perl package). Since some of your executables are already written in Perl, you can add POD formatting directly to your scripts and they can be turned into POD files directly. I've also seen several projects use POD format even though their code is written in other languages, due to POD's simplicity.
To add an additional directory of man pages, you can set the
$MANPATH environment variable. Prefix
$MANPATH with a
: to have it added to the list of already-configured man paths. Use the
manpath command to see the currently defined man paths.