UW Honors Program would offer a great community and a good complement regardless of OP’s residency.
An Interdisciplinary Honors student will usually take one or two Honors courses and one or two “regular” courses per quarter, which I suppose is what they mean when they say they “combine the intimacy of a small, interdisciplinary liberal arts college with the strengths of an excellent public research university.”
I see what you were referring to about the courses in those other honors programs. For example, Penn State has about 1,845 honors students and about 376 honors courses, many of which are major specific. In comparison, Washington has about 1,000 Interdisciplinary Honors students (about 250 per class of 6,500) and about 100 Interdisciplinary Honors courses, not counting all of the other courses that may be taken for Interdisciplinary Honors credit on an “ad hoc” basis. At Washington, the approximately 500 Departmental Honors students add “honors” elements to their major coursework, usually an additional 10-15 credits of upper-level courses, additional research or an extended thesis with guidance from a faculty mentor.