Moby wrap question.

This may or may not be a complete stupid question but to those who have used moby wraps how did you do all that when out in public? Did you wrap before leaving and then when at your destination put baby in it? Or did you wrap once you were at the destination ? I'd like to use it while grocery shopping and such but the wrap is SO long I don't want it to get ruined when the ends of it hit the parking lot.