We'd treat it the same way: kids play area. Some might prefer the possessive. If you choose that route, make it kids' play area, not kid's play area.

Our style is 

Webster's New World College Dictionary does prefer 

This is one of the times when we differ from our preferred dictionary.

Since Luis is a singular proper name, our style for the possessive is Luis'. Others may have different styles. Here's the full entry. And the relevant section:

SINGULAR PROPER NAMES ENDING IN S: Use only an apostrophe: Achilles' heel, Agnes' book, Ceres' rites, Descartes' theories, Dickens' novels, Euripides' dramas, Hercules' labors, Jesus' life, Jules' seat, Kansas' schools, Moses' law, Socrates' life, Tennessee Williams' plays, Xerxes' armies.

I see that non-personally identifiable is a term (some might say jargon) used in some technical contexts. I'd avoid it if you're writing for a general audience. How about data that is anonymous or can't be traced to a specific person. If you need to use the term, hyphenate it. And explain it.

Yes, that's fine

Yes, that's correct. Of course, you can presumably provide full details after an initial reference.

Yes. Here's the full guidance.

Yes, in most cases, spell out a number that starts a sentence and use hyphens (not dashes) in your example. Your third example is correct.

It's fine as a way of emphasis. But we use a space on either side of the dash.

No, it's lowercase on later references in AP style.

We'd use the lowercase, as with most disorders that don't stem from a proper name.

In this case, I'd follow the general usage of campgr0unds and use the slashes. That's no doubt clearer to users. 

No. Him is correct. You wouldn't say ... this awareness led he to push forward ... 

You could call it simply the federal Office of Dietary Supplements on first reference, and say later that it's part of the National Institutes of Health.

With a comma: 68,000.

Either is fine.

Our style is two words. Others may have different styles. Here is our entry:

Preferred for cameras mounted on clothing, generally of law enforcers. When the condensed version appears in headlines or in quotes, it is bodycam, one word.

     "My greatest moments of inspiration have come from early mornings spent on my balcony with my cat. ...

    When a truly compelling idea strikes, however, Chester is quickly dethroned and replaced with my laptop."

That's correct. Perhaps in this usage, though, you don't need to incude the Inc. on first reference, or at all.

You need some reference in the attribution showing that the person speaking is associated with the company. Some examples (and note the changes in bold to conform with grammar and style):

“As the energy industry continues to transition to cleaner, sustainable production, Renewable Energy Group is at the forefront of this transition, providing our customers fuel solutions that are easy to use and deliver carbon reduction now,” said Renewable Energy Group's president and CEO, Cynthia ‘CJ’ Warner.

or

“As the energy industry continues to transition to cleaner, sustainable production, Renewable Energy Group is at the forefront of this transition, providing our customers fuel solutions that are easy to use and deliver carbon reduction now,” said the company's president and CEO, Cynthia ‘CJ’ Warner.

Or to use the title as a title and not a descriptor, omit the comma and use the capitalized President:

“As the energy industry continues to transition to cleaner, sustainable production, Renewable Energy Group is at the forefront of this transition, providing our customers fuel solutions that are easy to use and deliver carbon reduction now,” said Renewable Energy Group President and CEO Cynthia ‘CJ’ Warner.

“As the energy industry continues to transition to cleaner, sustainable production, Renewable Energy Group is at the forefront of this transition, providing our customers fuel solutions that are easy to use and deliver carbon reduction now,” said company President and CEO Cynthia ‘CJ’ Warner.

As you have it is perfect.

It's understood that the speaker hasn't changed. As you have it is correct.

I'd go with M-F or Mon.-Fri. 
We don't have a specific style.

We use the hyphen for ranges such as that. AP style doesn't use en dashes at all.

Singular, at least in the U.S.