Just a note: There is a slight chance of precipitation coming through for this weekend. So be prepared.
Also, it is late in the season. Even though online numbers show all slots are reserved, it is highly likely that if you show up on Friday morning, you will be able to get walk-in (free) permits to hike on Saturday (and the same on Saturday for a Sunday hike).
If you are willing to hike on a weekday, there is no problem with permits -- Look at last years
unused permits numbers for September.