A pair of recent court cases in Oregon will probably result in more warning signs going up on public lands used for recreation.  The Port of Hood River Commission received a legal briefing on judicial decisions reducing the recreational immunity for agencies that allow their properties to be used by the public, increasing the risk of liability claims as the result of recreational injuries.  Port Executive Director Michael McElwee says they have been advised to increase signage to warn waterfront users of the risks involved.  McElwee says they expect to have signs up prior to the summer recreational season, adding many other agencies are facing the same challenge.