Well, when at DLR we try to eat real foods, rather than packaged. Uncrustables are right out b/c they have both c.s and hfcs, so if we want PB&J we bring in a sandwich. We bring granola bars for snacking, and since May we keep a hefty bit of budget for the fruit, the marvelous fruit, they sell at DLR. Not organic but incredible!
The chocolate covered banana was safe for my son. We didn't go to Haagen Dasz in DTD, but if we had I'm sure they would have had some safe flavors. Their store-bought pints are mainly, but not always, safe, and when I emailed the company they said the store would have ingredient lists I could read.
We won't even touch the ice cream
inside the parks now.
We've had it twice. Once before we had figured out the problem at all, but I *definitely* remember a massive tantrum after eating ice cream on Main Street (we figured it was b/c he was 2 and we were getting ready to leave the park and he was tired, but we've since learned that "normal" tantrums are much much different than corn syrup product tantrums). The last time was in September, and we had only figured it out in July and I wasn't reading Every Single Ingredient in things yet.
No soda, obviously, until they get Thomas Kemper products, as they are now flavored with cane juice.
Their cookies seem to be OK, even though the vanilla might have the evil ingredients. Most vanillas, it seems, have either c.s. or hfcs in them. Regardless, DS doesn't react with the chocolate chip cookies, and thank goodness, b/c he has to bypass SO much fun stuff there that I would hate it if he couldn't have a cookie!
No syrups at breakfast of course, but powdered sugar on pancakes/waffles is fine for him. Thankfully it's not an overall corn problem, as powdered sugar is "cut" with cornstarch in minute quantities. DS doesn't have a problem, but the daughters of a friend of a friend can't have ANY corn, and even that amount of cornstarch causes them to react.
Anything I haven't mentioned is b/c I haven't had it (we are vegetarian) or it has one or more of the "big 3" as I call them. Anything with marshmallows, obviously, it out b/c of both reasons. We went camping the other weekend and lamented s'mores, but marshmallows ARE corn syrup and gelatin, there's no getting around it, LOL. And as you mentioned, the graham crackers, russa frussa grumble grumble....
I want to be clear, though. This isn't a general "for our health" avoidance of these products. My son *attacks* when he has them. He had a DumDum at a festival, and attacked me 20 minutes later, screaming and clawing at my face, hitting and kicking me. That was my "aha" moment, once we got home (I had to carry him home and he passed out on my shoulder halfway home in the late July heat) and I posted about it and thought about it.
The "big 3" are poisons to him.
Disneyland has been a good learning experience for me, to find out what all it's in and that I can trust nothing. When he ran around in circles outside of Adventureland, not caring if he knocked into people, not listening, not hearing, and definitely not obeying me, when we got home I looked up Dole Whips, which we had just had, and it has c.s. solids in it (the edit of the ingredient list on wikipedia is from me). Meanwhile during that, hubby had all but passed out on a bench, which at the time I thought (rudely) was b/c he was lazy and such, but we have since determined that those three ingredients cause a blood sugar weirdness that causes him to fall asleep.
Both of them can have normal sugar without a problem. I bake quite often, from scratch, and they can eat large quantities of chocolate cake with chocolate icing without a problem at all. It's the stuff related to corn syrup that does them in.
Most people just avoid them b/c of health reasons. For us we *have to* avoid them. Well, to be honest,
I don't. But it just doesn't feel right to sneak away from the family just so I can have a Mickey bar, so I eat like they eat almost all of the time.
) 
