GlutenFreeAthlete

I know I am chiming in late, but what gluten-free pig said, Infinit is good, I usually use Hammer nutrition perpetuem which you can keep in bags, mix with water at aid stations, etc...

Like many have said, I usually just do what feels right at the moment when my system is down. I usually spin on my bike on a trainer for an hour, makes me feel much better, I try not to focus on the miles or distance at all! Hope this helps.