@EllaV,
If they will fit in her vehicles, she should put them there and not the trucks.
If they have to go on the trucks, she can wrap them in quilts, thick blankets, towels, etc. She can also wrap them in bubble wrap. For very small items, she could place them in plastic bags and inflate the bags with air before tying them closed. Once done, she can line the bottom of large boxes with blankets or towels and then layer the items in the box with more towels between layers.