It's entirely dependent upon where, specifically, in the Cascades OP was. There are numerous wilderness-designated zones that don't have limits on number of peo

It's entirely dependent upon where, specifically, in the Cascades OP was. There are numerous wilderness-designated zones that don't have limits on number of people in an area and access is free, save for the requirement that you fill out a permit at/near the trailhead or wilderness boundary.