Zion is one of the most beautiful places in the United States, in my opinion. It is to the Grand Canyon what a delicate gothic chapel is to the massive St. Peters.
I don't know what it is like today, but when Carlson and I backpacked there in 1987, there were no amenities at all once one ascended from the camp ground and park curio shoppe. We had to tote (and conserve) our own water. Those were also pre-cell phone days. But being young such absences were of no concern.
For two days there was nothing to do but enjoy our own company and the vast expanse of a silent nature that seemed primordially welcoming.
That... and watch the little squirrel feasting on his pit. :)
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