Thanks to Greg Weagle for pointing me in the direction of Mike Peraza's blog. The former WDTVA'er has just finished a series of posts entitled "Days at DuckTales" discussing his work on... well, you guess. You can find part one here.
Peraza is the fellow who drew the heart-warming and unforgettable "quasi-picture-book" story "Tis the Season" (UNCLE $CROOGE #251, February 1991, written by Bob Foster). His blog posts contain several more examples of his artwork. Check 'em out!