I know a lot of you like to line up to make sure you get to sit together.... you might want to ask the gate agent about the flight.
I had two SW flights today and one yesterday. All of them were half full. When I asked last night I was told the flight would have 62 passengers. People were sitting there for an hour and a half waiting to get on. Maybe they have specific rows, but... more likely they wanted to be sure they could sit together. If the plane is that empty you probably don't need to camp unless you just enjoy it.
I had two SW flights today and one yesterday. All of them were half full. When I asked last night I was told the flight would have 62 passengers. People were sitting there for an hour and a half waiting to get on. Maybe they have specific rows, but... more likely they wanted to be sure they could sit together. If the plane is that empty you probably don't need to camp unless you just enjoy it.