L.A.
Some parents pay other parents to drive their children to their child care..
Do you know any other parents that will be picking up their preK also?.. Maybe a stay at home parent would like a little extra money each week, driving your child..
Maybe call the school and see if they know of a parent you could approach.. Many times at schools, their are parents that have had a few children at a school long enough the office knows them and can give references.. Otherwise see if once school starts if there is a parent that could help out..
See if there is a PTA newsletter you could place a little ad.