Plant closing and notice period questions (update)

My employer announced that the site will close and gave us written notice. This is my first time dealing with any of this. They offered a retention bonus for people who stay. Should I stay for the bonus?

Write down key dates and keep copies of the notice. Mine helped when a question came up later.

Thanks for writing this out. I went through something close to it 12 months ago, and it settled down once I kept a simple log of every call and form.