2 big dirt bikes in a Ridgeline and 2 trackbikes in a shortbed Screw, many miles, no problems, both on tailgates.
Never thought to ask first. Good idea.
A board to spread the load of a pig might be a good idea.
Everybody is ignorant, only on different subjects - Will Rogers
Do not do to others what you would not have them do to you - Hillel
If you can't be knowledgeable, be certain