That was not very nice.
Only in that "Manifold Destiny", unless it's in reprints, is extremely expensive. The concept, the process, and the article, are entirely serious. You CAN cook using your car engine. In all seriousness, if the OP has a vehicle at Walt Disney World, probably a drive to the parks would properly heat the waffles.
Honestly, I was not trying to be mean. That cooking method IS facinating. It was my first thought, albeit totally snarky. I am astonished this was a real post for advice, I assumed it was a troll (yup, I know what that makes me

My garage freezer was accidently unplugged this summer and everything had begun to thaw out. Waffles were one of the things I tried to salvage but we learned they were soggy messes after refreezing and reheating. OP, I think it would be very hard to keep the waffles frozen. It's probably safer to count on something more shelf stable and have a chef prepare allergy safe waffles one or two mornings as a special treat.