A better bet than hard candy might be glucose tablets. You can get them in just about any pharmacy. I keep them here at home, in my desk at the office, in my back pack. They're very effective treating low blood sugar but are NOT a substitute for eating. Ask your endocrinologist about them.

Also, the American Diabetes Association website is an excellent resource. That's how I found the endocrinologist I'm currently seeing. There's a lot of valuable information to be had.