The problem I experience with void times is that when you want one so does
everyone else. So you get the "all briefers are busy" and wait and wait and
wait. Maybe I'm not doing it right. I call FSS and get the void time from
them after they get it from ???. Is there a better way?

Where I live, there's a clearance delivery phone number that's different from
the WX-BRIEF number. Not sure that's true everywhere, though. Never had the "all
briefers are busy" message on the clearance delivery line.