My DH can no longer pick up LO from daycare today and I can't get out of work. Our babysitter can pick her up, but doesn't have a carseat. I think my only option is to send her right now to buy one. She could go to Walmart, Target, or BRU. What is the best/safest option that would be available at one of those places? Something easy to install? Her car does have the LATCH hooks and she will only be driving LO 2 miles. Recs???