We use a piece of plywood on the ground. Drop bag on plywood, cut with a square shovel. Add to mixer one shovel full with water until desired consistency is achieved. I usually do 2.5 bags per load. That is about what I can fit in my wheelbarrow. Or you can order a truck that will bring it pre mixed. Anything over a pallet worth, I have a truck bring. Mixing 100 bags will take you all day.