6000 TNS is quit a bit, if you've got long stretchs and not alot of stop and go a Road Widner would be the the quickest and cleanist. You would have to talk to a local Paving contractor to rent one with an operator. A good operator could walk right through it and with some labors to touch up against curb and walk. Most widners will adjust to different widths. Road Widner theres no double handling just have your tri or quads dump right into it, spit it out and strike it off.
Somebody does make a road widner attachment for skidsteer but I'm sure renting one wouldn't be feasible.
Rock shooter will be way to messy.