Using Car seats Outside Of The Car
More than 8,700 infants end up in the emergency room each year because their car seats are used improperly outside the car, according to study presented Monday at the American Academy of Pediatrics' annual meeting in Washington. Ref. Source 3
I know as my children were growing up we had separate car seats and carriers when they were out of the car. We liked to leave the car seat all hooked up in the vehicle so we did not have to strap it in and unstrap it all the time while traveling. putting the carrier in the trunk or behind the seat the child is strapped in works great.