His Disney roles included D.J. in Herbie Goes Bananas, Farley Mowat and Tyler in Never Cry Wolf and Longnecker in No Deposit, No Return. He also directed Air Bud and contributed special thanks in Empire of Dreams: The Story of the 'Star Wars' Trilogy.
Smith devoted almost three years to filming Never Cry Wolf. Smith said, "I was much more closely involved in that picture than I had been in any other film. Not only acting, but writing and the whole creative process." He also found the process difficult. "During much of the two-year shooting schedule in Canada’s Yukon and in Nome, Alaska, I was the only actor present. It was the loneliest film I’ve ever worked on," Smith said.
Carroll Ballard, director of Never Cry Wolf, asked Smith to write much of the narration for the film. Smith also performed in a lengthy scene with wolves and caribou in which he was entirely naked.