I haul the 16’ trim pieces exactly like I did with my F150 Supercrew. I strap them on the roof using pool noodles to keep them off the paint. The bed is designed to haul 4x8 sheets. They sit on the wheel wells and the tailgate has two settings when open. With the tailgate in the upper position it supports the plywood or Sheetrock etc.

Is the maverick perfect? Nope. But i don’t know of any truck that is. That’s why you have so many options,