To divorce this from the discussion of the inability of finding a lawyer. You have two options for venue: either the county YOU reside in or the county the spouse is residing in. Dalles, OR is right out as it appears that is neither. (There is slight exception in Oregon law if the wedding took place and the reason for dissolution is something like bigamy or one of the other prohibited/voidable reasons).
Note that if you want to move to venue shop, you must reside in the new location for six months before you avail yoruself of the courts there.