1.Don't order soft drinks, drink the free ice water instead.
2.I personally enjoy eating a kid's meal where I get an entree and 2 small sides and a drink, especially at places with free refills like Backlot Express, Sunshine Seasons and
Restaurantosaurus. Then I enjoy a snack later on and don't feel stuffed.
3. I find the new toppings bar at Pecos Bill makes the burrito bowl (and other entrees) much more filling. It doesn't save you any money unless you split the meal though.
4. You can always bring your own food like Uncrustables in to the park. They work well if you take them out of the freezer in the morning and are thawed out by lunch.