FWIW, the Hell's Canyon Motorcycle Rally (www.hellscanyonrally.com) is being held in Baker City, OR during May 19-22. It's almost 2-hours west of Boise, ID.
Open to all brands/models, BUT most of the motel rooms are already booked-up. La Grande, 44 miles north, has plenty of rooms, and is a nice ride via secondary route east of I-84.
I personally don't think Cambridge, ID is an ideal location for a m/c rally.
