Hi Smorgs! Long time no see.
I'm excited for you to get to go and see a play in Stratford. I've seen a lot of Shakespeare done, but never there where it all began.
By all means, rent the movie and watch it. Or read a summary of the plot, as suggested. Or at least have Mr. Smorgs give you a rundown of the plot. I think it will be more fun for you if you're not trying to sort out the characters for the first time while you're seeing it.
I remember Anne Hathaway's cottage, and I believe there was a bed there. Whether or not it was actually her bed is another question. I'm guessing the bed at the 4 Thistle Inn will be lots more comfy for your post-theatre activities.
Please come back and tell us how it goes.