yep, thats correct, lay them outDon't trim off the tops before drying/curing the onions. When the tops have dried and turned brown cut them off where they're papery dry and not still moist. I dried mine on the covered deck, on top of a rabbit cage so they'd get air circulation above and below.
Yeah, that looks like the backend of my old 1998 Ford Explorer coming back from a trip to town. I almost always check out my favorite places that have free pallets to pick up. I really like that cargo strap idea to hold down the pallets. I'll have to check my Explorer to see if it has some place to attach a strap. That looks much safer than me just stacking everything up in the back.