I haven't a clue
I called and have to drop trailer in town and bobtail up there. Still have to park in designated lots for large vehicles. But thanks for input. I also posted answer for others.
I'm not real sure about a tractor trailer. I would check in the National Parks and Recreation Department and look up the Grand Canyon, that should give you a list of vehicles/weight of the vehicle. I've never seen a tractor trailer there before but that doesn't mean they are forbidden. Let us all know what you find out. That would be great information for everyone!! Best if luck!!
There are alot of buses and campers hauling cars behind them that travel the road and a parking lot for them .cant remember if I seen any trailer trucks
Thanks! Your answer is awaiting moderation.