What kind of car seat do you have and what kind of stroller?? Just curious, because I found that with the seat we have (Graco that goes from harness to booster), it has indentations for the seatbelt when it is a booster that fit perfectly over the stroller handle so we don't have to carry it. We hook it over the handle (it is a light weight seat, so the stroller wouldn't tip-large stroller too) and then push the stroller by holding the carseat. That is one reason I would consider bringing my big stroller (rather than umbrella) again!