Anchorage! Alaska Airlines has good deals on flights, but fly whatever airline you want! Most flights will have at least one layover.
Safe answer is yes, but a REAL ID will also work. I recommend both if that is possible for you.
I recommend wearing blacks, greens, browns, and any other neutral! (No white, of course!) Temps range from high 40s to 70 degrees in August. Come dressed to impress, as there will be lots of photos taken!