there has been an overall drop in visitation to national parks in the last few years (http://www.nps.gov/pub_aff/refdesk/10MVUNP.pdf) and a corresponding drop in other uses, such as Rainier climber numbers (http://www.nps.gov/mora/climb/cl_stats.htm), and I gather from this thread, N. Cascades climber numbers. So, whatever changes have happened with permitting at NCNP, the trend seems larger.