My dh & I will be flying with our 2 1/2,6 & 9 year olds. We will need a car seat for 2 days out of the week we are there. Suggestions on whether to take ours on the plane or rent one from down there somewhere?? It does make me a bit nervous to rent one & I know it would keep her settled on the flight...but I hate to take up room in the hotel & have to haul it through airports!