"Local" is not good - I think patches should always go to CPAN (my CPAN patch directory is $CPAN/authors/id/S/SR/SREZIC/patches) and this patch should be references in the corresponding RT ticket.
And then use a distropref to apply the patch when building the module locally. E.g.
in reply to Maintaining Local CPAN Patches
comment: "bleadperl 31194 broke the test suite, also 5.00505 problems"