The dairy farm where Carol and the group corral horses is located on a property that has been featured on the show many times before. Most notable, it's the same location where Rick and Jadis took off in the helicopter in Season 9.
In the scene where the kids are offered some meat, Hershel tells the other kids that eating horse isn't as bad as eating spiders. In reality, the kids were eating beef jerky.
Ross Marquand says that Aaron has faith that Alexandria is going to be salvageable despite being decimated after the war and thinks he's one of the few people who has hope that Alexandria can survive.