I did start another thread but my question of using the top pin to lift it never got answered and I wanted a quick answer. And, my internet ettiquette sucks.
I have duct taped the seams. The light was shining through. Good tip right there. Thanks.
I am going to go with just the pin for lifting it. It's a 3/4" pin. I did buy a 36" length of 1/2" rebar and I flared the ends for "grab" but I trust the pin more than the bar. And, there was a post in this thread from someone who uses the pin to lift his box. He has thousands of posts here so I trust his judgement, not that I don't trust others.
The highest it will ever be off the ground will be when I lift it out of my truck. Even then I will just pick it up an inch or 2 and then drive my truck away. After that, if I have to move it, it will be just a few inches off the ground.
Tomorrow morning I visit the plant for filling. It will sit for 8 hours before my drive home and I will leave it my truck for a day or 2 before I lift out.