Good luck on your trip. If you are pressed for time it is pretty easy to arrange it so that you take a bus into Nazca to arrive in the morning, or early afternoon and then take a night bus out of Nazca to get to your next destination. There isn’t really that much to see in the town of Nazca itself…so I opted just to see the lines and then move on. However, I’m sure you can find stuff to do if you decide to stay the night, and I hear that if you do a flight they are the best in the morning anyway. Have fun!