The US National Park is awesome. The version of OS X called Yosemite was pretty good for its time. The conference called Yosemite that I went to last year after NAB was fantastic. If you’re in the US and part of the Mac or iOS community, then you should definitely make the time to go.
There’s no other place where you can hang out (and even eat dinner) with the Apple-related people you’ve been reading for 20 years, learn amazing things from amazing people, go on fantastic walks in one of the most beautiful forests on the planet, and then drink cheap booze* under the stars.
While I don’t expect I’ll be able to go again (I live on the wrong side of the world and NAB isn’t on at the same time in 2017) I’d definitely be going if I lived nearer. Yosemite (the park) is something you should do at least once in your life, and Yosemite (the conference) is a brilliant way to kill two birds with one stone.
*Optional but recommended