Do you play Dungeons & Dragons?

If so...
  1. What's the smallest group you've played in?
  2. Have you ever played a two person game? Maybe one is the DM and both play characters?
    I know that's a tricky prospect, but I've heard it can be fun.
  3. Have you ever played a solo campaign? Just you as DM and character?
  4. I've read a couple of articles about how to play a D&D campaign solo and I'm thinking of trying it, and was hoping to get someone's perspective.
  5. Thanks!