If you can plan ahead for next year, usually from May til about July 7, Six Flags puts alot of coupons out for buy one, get one free. You can find them in supermarkets, on coke product cans, fast food places etc. If this is an annual vacation spot for your family, check earlier on the DIS and I am sure someone here would be glad to try and track down some coupons and get them to you. My dd earns a free ticket through the reading program at school, so we went at the end of May. My dad and I took her (and youngest dd). It was cheaper for us adults to get in using a buy one get one free, than for him to get senior citizens discount.
Including his/mine and youngest dd's ticket we got out of there that day spending under $90. Just bought some drinks, but it wasn't very hot then either. I packed some snacks in my fanny pack for the kids to tide them over. Took a cooler and ate sandwiches in the car and our food was much better than 6 Flags. I've never been impressed with 6 flags food and really don't like their prices!
Anyways, we had a fun day and I'm sure you will too. Hope the lines aren't too long.