Hey Brent, 

I don't know of Oregon-based research about this species specifically, but there have been successful Holly-plantings in the area before. 

Yaupon is a Southern Native and may have some issues growing in Oregon. The University of Arkansas: https://www.uaex.uada.edu/yard-garden/resource-library/plant-week/yaupon-holly-2-26-10.aspx says that the plant is hardy through zone 10, but smaller, dwarfing varieties of the species may not tolerate the cold well. 

Thanks, 

Logan Bennett  

Brent