Did you really tow it all that way on the ball, as shown in your picture, without using any weight distribution? If so, consider yourself very lucky. I don't blame you for wearing your flame suit.
If I am not mistaken, your year Suburban was only rated to carry about 500lbs on the ball with no WD. I would not be a bit surprised if your tongue weight is around 1300lb when you are loaded and ready to go camping. In addition, GM is not known for making sturdy hitches in those years.
I am very glad you had a successful trip but sure hope you will consider getting a WD hitch before your next one.
Barney