my daughter is 18 months 19 days old.We are planning to travel to our hometown via car which 1400-1500 kms. she have her car seat .we will be traveling early morning till evening .no night driving.according to her sleeping time mostly early morning she will be sleeping for 4-5 hours .and afternoon 2-3 hours .. Is it fine to make her sleep on her car seat ? is it fine to travel such long distance with 2 haults and every 2-3 hours break ?