I am unclear on when to use the base of a car seat. Do you need to have the base in order to use a car seat properly in a car, or is using it up to you? What's best? I'm already anticipating confusion surrounding installing the car seat in the car, so it's best to figure as much out now! (We have the Uppababy Mesa.)
@margareth Make sure the carseat you get is certified to be used without the base and with seat belts only! ETA: jk I see you have the uppa baby mesa and it IS approved for use with the seat belts.