The campaign has been under fire from Republicans this month for not having an in-depth, on-the-record conversation with a reporter since taking over the Democratic ticket.
They're not hiding, they invite the press to all their events and just had a gigantic four day live action press release.
Whatever they're doing is working; the debate will be in a week and will dominate the press; they have been very good at ignoring DC insider bullshit and "waaaah I'm not being treated as important by the candidate she needs to come flatter my ego" is consummate DC insider bullshit.