Update: Moved about 7 small images and css into S3 and page load time is now < 3 seconds with 380 users on site. I'm about 90% sure that my efforts caused the improvement.
It's still up, but it's super slow with > 20-60 second page load times. I just moved some images into s3 which made it a bit faster. There are currently 267 people on the site according to google analytics.