Do places let you bring your own food/drinks??

I wouldn't worry. Stop at Guest Services and you will be fine. 

Good for you for thinking ahead.

My doctors office actually has a card which tells people that you have dietary restrictions and asks for special accommodations.  You should ask your doc and see if they have one too.

Have your doctor write you a note, pack your food in a collapsible cooler with a chiller pack, go to guest services with the letter and explain your situation.  I'm sure they will understand and have no problem.

I've always brought my own snacks places... if they are good about "checking" bags, just be better at hiding. The drink part is a little harder, most places will at least allow unopened water bottles in (not opened in case you trying to sneak in booze lol).

Thank you all for replys. The docs office just called and my surgery date is June 8th. So by the time we go I should be on "regular" food. So I hope it won't be to bad.

Would be nice to have a card. I see the doctor Thursday to sign the paperwork, so I will ask if they have something like that. Going to the movies and stuff would be easier that way!