Is there any consensus here on the best part-time MBA program in either Portland proper or in southwest Washington?

I'm looking at the part-time programs at these schools, and in my mind they're all pretty similar:

Portland State
Portland - Pamplin
Washington State - Vancouver

Anybody have any thoughts or experiences with these schools? Open to others as well but from my research I haven't found anything. I'd rather not go out of the region.

I think that of the schools that you're looking at, the ones in Portland are more established. The PSU enrolls more students, and the average GMAT at that school is higher; however, student there generally have less work experience than the UP program. So I think your choice would ultimately depend on where you are in your career arc.

Another option, again, depending on your career expectationa, would be the EMBA program at Washington - Foster. You can select a scheduling option where you'd go to classes one long weekend per month, if you can do the quick flight to Seattle that often. This program is ranked by both Businessweek and the Financial Times.