So you know when it's time to go to sleep, you make the room all dark and quiet, you lay down somewhere comfortable and you close your eyes? That's like Montana.
You know when you're trying to sleep in an airport, it's bright and there's noises everywhere, and you just can't quite get comfortable in the chair? That's like the city.
Don't get me wrong- it's always nicer to be at the airport with people you know who will stay awake and tell you when your flight is bording, watch your bag, and let you lean on their shoulder. But you're always going to fall asleep better in your own bed.