The left will never care about his Trust, or donations to charities. They will try to destroy him for the rest of time because he was right, and he was effective.
They did, however, try to beat him up when he cashed out of Halliburton, at their badgering, and the timing was such that it was a good move, for Halliburton stock dropped shortly thereafter.
I don't recall anything about the trust the Cheneys set up, or that "Lady Bird" Johnson was a very large (thanks to her father, iirc) Halliburton shareholder at the time.