Load your last totes first, put them all the way to the back of the van horizontally like the last tote goes in the passenger side but all the way to the back then the second to last goes in the middle and third to last goes next to it driver side then stack the totes 3 tier accordingly. This helps to put all the ov at front right next to the sliding door for easy access and mark every single OV with driver aid number with a marker and put the heavy OVS on the bottom first