I hope you have good concrete contractor?
I am remodeling contractor in CA and have not seen bigger slab without a crack.
Concrete contractors blame it on earthquakes and such, but doing small slabs on my project I experienced that good concrete vibrating makes whole World of difference.
That said, never have seen driveways pours done with vibrators.
I think as well that 10" is tank-grade slab.
5-6" is well build. You want it stronger, put more steel and make sure steel is suspended, not laying on the dirt.
Sounds like exciting project