Here is the Mack CL350 off-highway logging truck. The truck has options for multiple color configurations, a stock or Pacific cab, engines, headlights, rear fenders, and many others. The trailer loads onto the truck while empty and has a loading strap for lifting. Both the truck and trailer have tipping bunks for dumping an entire load at once.
Interactive Control is required for the tipping bunks to work. There is a trigger on either side of the bunk for the stake on the opposite side. I would suggest using a machine to push the logs off and building a small ramp for them to roll down. Enjoy!
Thanks to Mayto for the 12V71 and C15 sounds.