Ditto all that's said above about the LV-DV-LP route. There are usually reasonably priced non-stop flights from most cities, and that drive is a real treat. Spectacular views all the way!
In addition to the dining options that Gary mentioned, there's a diner at Death Valley Junction that's been there for a few years and their burgers are good (although the service can be a bit slow). It's at the opposite end of the building complex from the Old Opera House. While you're there it's also worthwhile to step inside the Amargosa Hotel lobby for a coke from the machine, check out the murals on the walls, and read a little bit about the unique history of the place.
For an alternate route from Las Vegas, drive north on US 95 a ways past Beatty, turn west on NV 266, and go to the campground on White Mountain Road (elevation 8000') near the Ancient Bristlecone Pine Forest for the night. (There's no water anywhere up there, so stop and get some on the way). Then in the morning, continue acclimatizing with one of the hikes Karin suggested, the 4.5 mile Methuselah Loop Trail at 10,000' or White Mountain, before heading to Whitney Portal or Horseshoe Meadow.
Regarding gear on the plane, I don't know if you use a white gas stove. If you do, make sure the stove lines are aired-out and the fuel bottles are washed clean. Here's what the TSA website says about that: "Camp stoves can travel as carry-on or checked luggage only if they are empty of all fuel and then cleaned such that no fuel vapors or residue are noticeable.” I've actually had one rejected once and I had to buy a new stove when I got to my destination (it's OK, I wanted a new one anyway). Apparently, their fume detection equipment is pretty sensitive. If you use a canister (like IsoPro) stove, fumes aren't a problem. Just wait 'till you get there to buy the fuel.
Have fun!
