Unique in Oregon, says Swisher, Jackson County's arm of Lifespan operates on a cooperative model, allowing clients to volunteer hours in exchange for respite hours.You can not even say how much it is worth, says Sheila Stedman, a paid respite caregiver who accompanies clients at Lifespan's program.Calling its group the Social Club, Lifespan organizes games, crafts, live music and other activities f