We do the same for driveways 12" base compacted in 2 inch lifts, we rent a much bigger compactor for driveway paver jobs. I dnot use concrete for edging but if you do get the geotextile coming up the side in between the pavers & the poured edge so if the concrete cracks the sand/aggregate doesnt escape thru the gap12" of 23A stone mix compacted every few inches. 1" of 2NS sand screeded. Don't forget to use poly Techniseal sand in the joints and a good solid edging. We use BEAST from UNILOCK, some people like using concrete.