I totally get why people might disagree with me here, and that's okay. But if I could go back, I would absolutely have taken the one offered by my school, even it took up much of my summer. It's a lot easier to learn something the 2nd time around rather than the 1st time around, especially with the cadavers. There was never any help in my school for identifying structures. Even if you don't remember a ton, having a vague idea of where some nerve might be is a huge benefit. Might not be right for everyone, but in the end of the day you have to do what's right for you. That being said, I wouldn't do that for any other course.
I don't agree with the bold though. For me, if you could easily integrate it into your senior year schedule, that would be a plus. I guess for me, I get bored with huge chunks of time off, and would rather have more short breaks along the way. Just some food for thought.