No worries lah, if you can make it - it would be good as not many Singaporeans have been up northwest much unless you happened to be in the US for a very long duration. If you can't, then no big loss anyway since you can get plenty of nice sceneries in California too (as DD suggested).
As for the nice pics you've seen, don't be under pressured hor... Unless you're going to be awake before the sunrises near coast or nice places - you'll just have to make do with what you'll see. Wish you all the best in getting all the nice lights, blue skies and beautiful cloud formations when you take the pictures!
I guess you won't have time to view my albums (time to put them back into the storage again) hahah!