Many of the restaurants people are listing are good, but with a family of 5, you may or may not save money.

There is a Panera nearby, that could work for you as well. If you do go to table service restaurants, you might look at their websites for clubs/rewards to sign up for, and usually they send out coupons. We did this with Mimi's, and they send out buy one, get one coupons frequently (however, breakfast there cost a small fortune, and one of our meals was a kids meal!). The farther you move away from Harbor/Katella, the better luck you might have with family restaurants that are probably cheaper.
Thanks for the info about Mimi's coupons.
How old are your kids? At DCA, the mexican restaurant serves LARGE portions, and that can help keep costs down with kids. At Cafe Orleans, my husband and I always share the Monte Cristo, because it is too big for one person to eat. My daughter is only 4, so we often stop at Boardwalk Pizza and Pasta because they have uncrustables (PB&J) and applesauce at the pay stations.