Can you take sandwiches inside Disney

Yes you can.

Yes, I strongly recommend that you put your water bottles in the freezer overnight. Don't forget to also bring small snacks and power bar to charge your phone and camera.

Yup. First time here my wife and I packed our lunches and put them in a back pack. The back pack weighted like 15lbs in the morning but got lighter as the day went on due to us eating the food and drinking water bottles we packed.

Yes

Yes you can take sandwiches inside Disney. They also sold foods there too.

Yes and coolers