I also have seizures, but mine are induced by certain chemical smells. I can't be around fresh paint and other smelly chemicals for a long period of time. My advice is to not rush around and stay hydrated. Take an afternoon break to go swimming, take a nap, or just relax at the resort. If your son starts to look tired then, just sit and have an ice cream bar or a cold drink while at the park before moving on. Since his seem to be fever related, then I don't think you have to much to worry about. I would still check with his doctor before you go for any recommendations.