See this link:
http://news.yahoo.com/yosemite-river-plan-could-limit-visitor-access-150213625.html
Here is an excerpt:
...."The Merced River Plan is a big deal that the public is snoozing through," said Rick Deutsch, who has written a book about the park. "It could radically alter the facilities, parking and recreation at the park."
The end result could do the unthinkable in a place that belongs to the people: set limits on the number visitors allowed in the gates, even as some worry whether the park with a hotel with big city prices has enough access as is for those of moderate means.....
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....Almost certainly the end result will be reduced access to the river. Visitors already are funneled to riverbanks along paths instead of cutting through forests. Kayaking and rafting might be limited for the launching impacts on riverbank erosion. Some picnic areas could be closed or made smaller to reduce the trampling of vegetation. High country camp sites could be made fewer.....
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....Stressing the park further is recent acknowledgement by officials that the hazards of boulders sloughing off the granite icons along the valley's edge are a threat to public safety.....
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Wait. What? They are going to keep us away from falling rocks? OSHA will take over the Valley? Help. We may all be forced to stay on the paths.