You can fit 20 bales of hay into your truck if it has an eight foot bed. Start with four bales in V-formation.
Next, lay six bales in the valley, all with the same orientation.
Repeat the process in the rear half of the bed.
The finished stack will resemble a cube.
It doesn’t obstruct your side-view mirrors and if you’re not going too far, ropes and straps won’t be needed. The feed store offers a price break at 20 bales so this is really great!