You are better off staying put in your house. Get supplies, the most important is two weeks of water. You probably have two weeks of food, but more is better. A

You are better off staying put in your house. Get supplies, the most important is two weeks of water. You probably have two weeks of food, but more is better. After supplies return, it would mainly be waiting around for services to get fixed. Then could think about leaving. One big problem with walking to safety is that the bridges along the highways will be out. Plus, a lot of people will have the same idea. Most of the official help from central Oregon will be focused on helping western Oregon and not on refugees. Finally, you are missing route for the supplies: the river. It should be possible to clear the fallen bridges and open the ports. Ships can provide a lot more aid than trucks.