The Roy Webster Columbia River Cross Channel Swim is moving to Cascade Locks.  The Hood River County Chamber of Commerce posted swim registration information on its website Wednesday that the annual Labor Day swim in the Columbia River will move to the west.  The document says 95 percent of the swimmers the Chamber polled were in favor of the move.  Chamber executive director Mike Glover says the key to the move is retaining volunteer numbers, but they are getting commitments to take part.  With the move, participants will get on the Sternwheeler Columbia Gorge at the ferry dock in Cascade Locks to go over to the Washington side of the river.  The swim will be two-tenths of a mile longer than it was in Cascade Locks.