Yeah I don't know, I can't guarantee anything... but I have annual passes and go often and they are always barely looking through my bag all nonchalantly and I always feel like I can get away with a bomb or gun in my bag if I wanted to... it also helps if you go at a busy time and they are busy and exhausted with a long line of people with bags to look through.
I can't imagine they will make you throw out pre-packaged dietary foods if you say they are neccessary, if you cause a fit at Dland they let you get away with murder, I used to work there, and the guest is always right as long as you ***** and scream enough