With the third option crossbars with side rails you can secure an item to the side rails and run tie downs from front to back securing them to the crossbars.
How to tie ladder to roof rack bungy cords.
See that a cautionary note is included on the first stair step.
I fear i am naive however.
2 take an end of the safety strap and loop it down under a roof bar that runs perpendicular to your vehicle and then back up to the top of the cargo.
With the cargo on your roof lay the safety strap across the width of your cargo.
Wind the cord tightly around the leg of the ladder.
Use a tie down that wraps around the item and the rails.
Hook one end of a bungee cord to the lip of the gutter.
See the gallery of photos for bungee cord tie details.
A simple bungee cord kept it tethered and out of the way.