Hood River County Commissioners have approved updates to the codes for farm and forest zones, including revisions they had requested to deal with agri-tourism events on farm lands.  The changes set up three different levels of events, starting with a one-time event for 50 people that could be permitted by the planning director, and moving on to needing a conditional use permit for larger multi-day events or a series of up to six events on a minimum of ten acres of land.  County Administrator David Meriwether says people need to ask if they are considering agri-tourism events.  In other business, County Commissioners approved a less than one percent rate increase for Hood River Garbage, and issued letters of support for irrigation districts seeking grants to do improvement projects.