I get that it would be WAY easier with a keyboard, and WAY faster. In my opinion though, using a keyboard puts a barrier in that 'face to face' scenario. This is how I usually go about it. First thing's first is getting yourself a moment, even if it's a second, of confidence before you enter the room. Mumble to yourself "I'm the baddest mother.... here." Something along those lines. Once you do enter, They SHOULD already know your name, so you get a pass if you stutter on introducing yourself like I do. Once they ask their first question to me, that's when I say 'First and foremost, I just want to say I do have a stutter, and it gets bad when I'm nervous, which I am, but I don't let it affect my work capability at all.' That's it. Address your stutter first. It'll keep you from focusing to much on it, trying to hide it, and it'll let them know you have a stutter and they don't have to hype focus on it and wonder if something is wrong. I've had interviews with one on ones, and panels (which I'm not a fan of). So far, they've all been understanding and are patient.