This was the project last weekend.
My son "re-boxed" the entire section at the back of the house and then built the box for the patio pavers. We filled in everything else with small stones and leveled as much as possible. Our town is built on a series of hills and my property is about two feet higher than my neighbor's. We have a retaining wall between the properties but my yard still slopes significantly. Chad did an excellent job given the situation with the slope. This weekend my younger son is coming and river rock will fill cover the grey stone. Updates after the weekend!