When Tara (Alanna Masterson) and Heath (Corey Hawkins) are talking in the RV, Tara says that rule number one of scavenging is that "there's nothing left in this world that isn't hidden." This is what Glenn (Steven Yeun) had told her in season 5, episode 2: Strangers (2014).
The fishing village, the beach, and the marshes were filmed on Jekyll Island, which is a small island just off the coast of Brunswick, Georgia. The island is mostly protected land owned by the state of Georgia and is a popular tourist destination.
The actress Deborah May, who plays Natania, the leader of the seemingly "female-only" colony of survivors, had a similar role in Star Trek Voyager S3E20 "Favorite So," where she portrayed a leader of an entire planet of women.
Greg Nicotero stated the sandwalkers that appear on the bridge were influenced by Lucio Fulci's zombies from Zombie (1979).
The only male characters who appear in this episode are Heath (Corey Hawkins), who has about five minutes of screen time, and Eugene (Josh McDermitt), who only appears briefly towards the end and has no dialogue.