whats best pracfive for ZFS on a whole disc these days ?

[Pete French]

just about to build a new ZFS based system and I was wondering
what the recommended way to dedicate a whole disc to ZFS is
these days. Should I just give it 'da1', 'da2' etc as I have
done in the past, or is it better to use GPT to create a
partition over the whole disc, which is marked as
being for freebsd-zfs ?

Not that I have had any problems with simply using bare
drives, but the phrase 'dangerously dedicated' does keep
nagging at me, hence considering the GPT route :-)

cheers,

-pete.