Honestly, if you need car seats, you will be hard pressed to get to BC on time for the reservation. uberFamily only offers one car seat per car, and, while you can call a cab with a car seat from AoA, they don't all have them, so you may have to wait a while for the cab to show up (we used to call cabs with boosters for my DS and it would take up to 20 minutes for the cab to arrive). The boosters were always fine, but, the car seats for the younger children looked a bit sketchy to me.
If you don't need car seats, yes, uber is your best bet.