I would opt for a compact tractor and hydraulic link box, plus a two ton trailer. You get the advantage of the pto for implements as well. A Japanese grey import would suit the bill. Another options a mule, a JD or Kawasaki, they usually have a tipper fitted.
Quads are great on the hill but are thief magnets, fuel hungry and noisy, being an old fart I think they are dangerous as well!
The advantage of the tractor is front loaders can be fitted as well for really heavy work.