John, For years I tried to eliminate this cane from my property with no success. Once it gets started it should grow with no problem and a creek side is ideal for it...although the hill cane seems to do OK on high ground too.
Bamboos are strange critters when it comes to blooming. The bloom periods are far apart, sometimes only every 100 to 150 years. But when it blooms, every plant is that specie will bloom and die no matter where it is in the world. I'm not sure the life cycle of our native Arundaneria but I would think it would be typical.
David, I have no problem sending some rhizomes to you as long as the Washington Dept of Ag has no problem with it. These local guys can carry it over state lines and have it planted without much scrutiny and the specie is indigenous to the South East. I'm pretty sure it will survive in your area. I believe our weather extremes are more varied here than there. Pat