Can I open Carry A Pistol in Yosemite?

I know as of February of 2010, I know that it is now legal to carry a firearm in National Parks. I also know that you must comply with State and Local laws, And California Law says you can open carry if it is unloaded, without any ammunition connected to the firearm in anyway, but you may carry a loaded magazine as long as it is exposed and not concealed. Now If I was enjoying a hike in Yosemite, can I carry in this manner?