My advice for people going into an internship like this would be to make sure you have all the paperwork and tests done that you might need for this experience...it will help so much. Also, record what you got to see everyday and take as many pictures as you can without seeming creepy. I also suggest working four weeks instead of just three. Take what you can get while you can get it.
Take a look at the interview I conducted with Dr. Butzen. It contains lots of necessary advice if you are considering going into this field.