Here's what I remember (some time frames may be off, it's been a couple of years since I heard Ducky speak):
Don was a bank vice president, who loved to draw. He would have art exhibits in the bank, but always saved the holidays to exhibit his stuff. He always loved to draw the Disney characters, and dreamed of working for Disney animation.
A local tv newscast broadcast the story about the bank vp who likes to draw Disney. A friend of Don's sent the tape to Disney, without Don's knowledge. They called and asked to see his stuff. He nervously sent them stuff. They said it was good, but he wasn't quite there. They offered to critique his drawings. They even sent him model sheets (a highly guarded item that shows exactly how the characters are drawn). He started drawing hundreds of drawings, and sending them to Disney. I don't remember the exact amount, but is was something like 100 drawings a week, every week, for several years. Sometimes they would respond with suggestions, often they would not.
Finally, Don decided that he would never get a Disney job living in Michigan (if I remember right), so he quit his job, sold his house, and moved to Orlando. He finally got a job with Disney, in the park, selling t-shirts. He talked with the animation department, who didn't have any openings, but he kept his 100 drawings a week.
Finally, an opening happened. They brought him in to help on a project for one week (or possibly a month, but either way, a finite amount of time). The first day, he drew Mickey, over and over. The second, Donald. Finally, he got to work on something, and he worked really hard.
At the end of his trial period, he waited, expecting to hear that he had a job, or was going back to selling t-shirts. He stayed past 5:00 p.m., and was the last person out that night. He was never told. He decided he would show up for work on Monday, to see if they would say anything. He has still yet to hear if he has the job. He just keeps showing up, many years later!
Ducky draws all the character animation for WDW marketing. Whether it's a small park ticket, or the largest billboard, Ducky draws the characters. He also designed Mickey Mouse's house in Toontown. On the
DCL, the Mickey hand on the elevator display is Ducky's.
Ducky is allowed to do personal artwork for sale by Disney, as long as it's on his own time and his own supplies. His original artwork is gorgeous, and is sold in advance (there's a waiting list for his stuff). You can purchase prints of his stuff, and often, his stuff is included in Disney publications like Disney Magazine.
I am lucky enough to have a large poster size sketch of Tigger that Ducky drew on our cruise. Ducky is an amazing person, and a personal hero. If you are lucky enough to be on a cruise with him, go to his session. If you see him walking through the boat, he is very gracious, and will draw pictures for you.
I hope that helps.