Depends on the size of the wheel barrow.
Their are big ones for what you need.....
But be careful, don't fill it too high, spillage.
The concrete company will most likely have one.
Or do you know any disc golfers that do construction/concrete ?
RECENT POUR PHOTO with access of truck.
You can do all your concrete calculating through the Quickcrete website.....consider a 10% waste factor. A typical wheel barrel capacity is 6 cubic feet.....however that's damn heavy...cut that in half for a manageable load over any distance or terrain.