Yosemite has just released a completely new management document with five alternatives.
Comment period is 03/19/2012 - 04/20/2012.

This has been forced on the park by an environmentalist lawsuit aimed at limiting access to the park and the Merced River. Their demands are so extreme that even the Sierra Club stayed out of it.

Here's the Yosemite document: Preliminary Alternative Concepts Workbook

Fresno Bee articles:
Quote:
March 20, 2012
Yosemite Valley peak capacity is 20,500 visitors

After a decade-long lawsuit and $15 million legal costs, Yosemite National Park is going the extra mile to get folks involved in its third Merced River protection plan.

Park planners this week put out five preliminary options and asked the public to take a look. The options included something I've never seen before -- a limit to Yosemite Valley visitors. It's 20,500, the National Park Service says.

Read more here: http://fresnobeehive.com/news/2012/03/yosemite_valley_peak_capacity.html#storylink=cpy


Quote:
EDITORIAL: Public must get involved in developing plan for Yosemite
Park Service is shaping rules that will change visitor access to Yosemite.
Thursday, Mar. 22, 2012

....As we have said many times, we don't believe that restricting access to the park is the answer to Yosemite's problems. But its capacity must be aggressively managed during the most popular months when Yosemite Valley is overwhelmed by visitors.....

Read more here: http://www.fresnobee.com/2012/03/21/2770285/editorial-public-must-get-involved.html#storylink=cpy