Metallica - Yes this is a WLS ?

 Does this mean I can put in a request for some modeling of Victoria's Secret 

You never know unless you ask

 YES!!! woohoo hehe  

 Great idea, Victoria's Secret is is Kevin!  

 haha!

What I would do is call your doctor and get a letter of medical necessity for bringing your own food with you.  Then, I would contact the festival and let them know that you have a medical condition and a letter from your doctor and that you might get very sick if you are not allowed to bring your own food.  They will almost certainly make an exception for you.  I have done this in the past numerous times, it has never failed me.  Good luck to you. 

If you would rather go a different route, eat mostly BBQ and you will be just fine. 

 I wondered about this.  Even if I could just bring a couple portions of protein drink, and then eat some BBQ I'd be fine.  I just don't see how I could actually eat enough protein for those 2 days!  

I have been allowed to bring my own food to festivals, concerts, amusement parks, and anywhere else I wanted to go.  Nobody wants to deny a medical necessity and face a possible problem, nobody.  You get the letter and you should be golden.

 great I'll call my PCM tomorrow.  My surgeon's office is useless so I know I'll never see one from them.

I agree with Elina. If you have a letter from your doctor, they're not going to risk the law suit by not allowing you to have your own food. That would be like telling a diabetic that they can't bring their insulin.

Have fun at the show!