Snacks for airline travel? (early post op)

Hi Everyone! I'm going to the well of wisdom here :-)

I will be a little over 6 weeks post op and need to travel to Kansas City and then the following week SoCal. 

the KC trip doesn't bother me much - I can work around a few 2 hour flghits, but, I'm on non-stop PHL-LAX flights for the second trip and I'm looking for ideas for airline/security friendly food for the 6.5 hr flights.

I'll just be hitting the "full food" stage and I have my 6 week checkup the week before I leave so I'm confident I can work around whats needed.

I have a few ideas so far:
 - String Cheese (it's been a staple lately) - I'll freeze a few sticks and let it thaw in my carryon.
 - protein powder mix - single servings - to mix in the over priced and oversized water bottles from the terminal.
 - soy crisps
 - protein bars? I've just started to taset a couple - too soon yet to really utilize them with the program I'm on.
- and lots more water


Anything I'm missing?

thanks!

Mark G.
 -

I just flew to Florida and had no problems with carry on food, just explain that your diabetic and need to eat every 2-3 hours.

Mark there is this protein that comes in a bottle, called Chike, it packs a good amount of protein and I think, if you can prove (via a doctor's note or something) that you have a need you can bring with you, it is lightweight and all you will need is water to mix it. . .  you might want to call the airline you are traveling on to see what you can do (bring) that will allow you to be prepared for such a trip. . .  Just an idea. . .