The bigger issue is finding a place that will ship rhizomes to ID. I have tried a few places, but most will not because shipping to ID requires a certificate saying the plant is disease-free. If you can find someone on craigslist selling rhizomes, you will have an easier time getting them. Great Lakes Hops was able to ship to ID because they sent the necessary paperwork with their crowns. If you order a crown and it arrives before it is safe to plant it outside, you could always plant it in a 5-gallon bucket in the garage and transplant it later. I purchased centennial and chinook last year, and both grew great in the CdA area. Anheiser-Busch grow hops up by the Canadian border. I would assume that most varieties would do well up here.