If you are worried about the impact of the US Government shutdown on your National Parks vacation, then please read this thread, as well as the thread titled "Possible Government shut down of Grand Canyon Park soon????", which is also a "sticky" at the top of the Arizona forum. Please do NOT post a new thread related to the shutdown or parks closure, if at all possible.
You may certainly add your comments to these two threads and ask more questions; we're simply trying to keep the number of individual Grand Canyon/NP closure threads to a minimum, and the relevant information all in one place. Thanks for your help!
In addition, we on the Arizona forum are very sorry if the government shutdown has affected you, and we do hope that everyone still has a great vacation, regardless! If there is anything we can do to help, please let us know.