I have a ramp that extends and is intended for getting a dog more easily into the bed of the truck, as it has an edge designed to rest against the edge of the tailgate. I found that the angle is somewhat steep with my new 2018 4x4...it was ok with my 2004 2x4. With that said, due to the angle, my dogs would have a hard time getting traction and would start sliding down backwards if going up too slowly. A ramp for your application may have the same issue, unless it fairly long to flatten out the angle. I have picked up my parents a few times with the new truck, and they have a difficult time with the height of the truck. For them, I bring along a small, single step stool/platform. With this they don't have as far to step up to get to the running boards, and then into the truck. Something like this, but a bit wider, may work for your dogs? They make plastic pet steps that could work also, just check out the dimensions for what may work.