When Hood River County Commissioners hold their annual goal-setting session at the end of this month, trying to track vacation rentals will be a topic.  It’s part of the continuous discussion on trying to find ways to encourage development of attainable housing in the face of high home and land prices in the County.  Commission Chair Ron Rivers says they need to get a handle on how many vacation rentals are actually out there.  Rivers expects duration of rental to be a big part of the definition, and how to apply transient room taxes will also be discussed.  The County Commission worksession will take place on January 31 at 9 a.m. in the Hood River Hotel, and is open to the public.