Generally amusement parks only allow baby food and food items brought for medical reasons. That said, coolers and lunch bags with anything more than a snack will probably not be allowed. There are lockers outside the park and a picnic area so you can eat if you bring a cooler. There are restaurants across the street on Harbor Blvd, lots of people go there. Plus there is food other than burgers at Disneyland, there is a Mexican style restaurant that has pretty good food, they also serve pasta, pizza and salads at a place in Tomorrow Land. <br style="color: rgb(51, 51, 51); font-family: arial, helvetica, clean, sans-serif; font-size: 13px; line-height: 16px; "><br style="color: rgb(51, 51, 51); font-family: arial, helvetica, clean, sans-serif; font-size: 13px; line-height: 16px; ">So that said, don't bring a bag of Subway sandwiches and be shocked when they don't let you in with it.