Maybe the airlines will give you double rations on water! Safe travels and enjoy Alaska. I've been there a few times while there's not much going on in Anchorage as soon as you get out of town the views are just big. the scale of everything in Alaska is big what we call a mountain they call a hill.
Here's a nice virtual tour (Girdwood Ski Area) and a list of things to do if you need any ideas :
http://www.destination360.com/north-...-in-alaska.php