Check posted notices at campgrounds. Forest users are asked to be careful with all forms of ignition, including vehicle catalytic converters. When agencies refer to hunting season, they are talking about a period of time when hunting is permitted in a designated area. A specific land area may be closed to entry and that closure will then close the area to hunting. Hunters and recreationists can obtain information about local restrictions by contacting the national forest, Oregon Department of Forestry or Washington Department of Natural Resources office nearest the area they want to visit.
Some national forests post restrictions on their websites.
But you can get an exemption.