That stone should compact very nicely. When I was a young pup, I worked at a rock crusher. We use to use 3/4 minus as a driveway/road bed, unless it was for heavier vehicles and then you would use 1-1/2" minus. The minus indicates that it is mixed with crushed rock down to 1/4". Packs real good and will make a asphalt like hard surface to drive on once it is compacted.
Are you going to be putting a slab for each of the roll up doors?
Why do I call it 57 stone? That's all I've ever heard it called in construction.