Hi. I have reservations for Yosemite Lodge for one night (Oct 17th.) I'm already working on a Plan B, should this situation remain until my visit date.
As part of my plan B, I contacted the Reservations office at the Hotel, and asked specifically what happened to reservations if the park was closed, and what was the current situation. This is the anser I got:
"Dear Yosemite Guest,
The government has entered a shutdown as of midnight on September 30, 2013. As a result, the National Park Service (NPS) is required by law to start closing operations in Yosemite National Park.
At this time, we have been advised by the NPS that guests with lodging reservations for October 1, 2013 and in-house guests will be able to continue with their vacation plans to Yosemite, but they will be required to leave Thursday, October 3, 2013 by 3pm.
During the shutdown, the National Park Service will close the Visitor Center. Additionally, Ranger programs and the majority of the daily activities will not be available including hiking trails, guided tours, horseback riding and bike rentals.
If you have an upcoming reservation and are not able to change your reservation to alternative dates, your reservation will be automatically canceled and you will receive a full refund. If you would like to change your reservation to an alternative date or discuss other plans to stay in Yosemite, please call us at 877-404-3741 or modify your reservation online.
We do not know how long this shut down will last and appreciate your patience as we all work through this situation. Please keep checking back for the latest information. The situation is fluid and can change quickly.
We apologize for the inconvenience, and thank you for your understanding.
For additional information, please visit http://www.doi.gov/shutdown/index.cfm"
Sorry if this is information already known, thought it could be helpful for travelers.