Here is my experience. I hope it helps others.
We arrived at the port at 11am and by 1140 am we were on the ship. My sister needed Special Assistance so we were one of the very first on board. We did have to walk total of 15 to 20 minutes. My sister must use a cane and we all were not happy at the distance to the point of entry. It truly was far...and mind you we had to carry our own suitcases since it was a CTN. No one at Carnival warned us ..if they had we certainly would have put her in a wheelchair.