Take the possibility of rainfall and flash flooding seriously when hiking the canyons of Northern Arizona. It is a good idea before you hike to study maps to identify possible escape routes. Be especially careful hiking the Grand Canyon, Marble Canyon, and Glen Canyon regions.
Own-root roses are propagated by rooting stem cuttings of one variety of rose. From the band size pots tyically sold, the plants will put out a few new full-sized canes each year and then reach mature height and width in 2-5 years, depending on the variety.
I love this site. They are reasonably priced and deal/breed exceptional own root roses. You might want to check out the David Austin roses as well. As for growing in a pot, roses need at least a 25 liter pot which is about the size of a half barrel. Washington State zone map: http://images.meredith.com/bhg/pdf/gardening/hardiness/hzm_Washington.pdf.