Originally Posted by
duchy
In your situation I'd book an Airbnb room close to a handy metro station. Go out to eat , wander the sights and take your photos then grab a few hours sleep before getting the Metro back to CDG.
Europeans eat far later than Americans generally do so dinner at 9pm won't be an issue.
OP:
Please note that contrary to the above-quoted post, the Metro does not go to CDG.
And, while many seem to operate, Air BnB's legality in Paris is subject to debate.