Although it's premature to utilize Twitter/FB, it probably makes sense to reserve an account now and keep it dormant until necessary.
I'm pretty sure I know what PW you would like to use but to sign up for Twitter do you have a specific email address in mind? Also, kindly let me know if you'd like to use a PW different from what I know.
Finally, with regards to setting up a FB page, I'll research it but wither Tim or Sundeep suggested previously that it may be necessary for you to be the one to actually create the page.