Yoga for Peace...

I've been doing yoga for about 3 1/2 years. In a couple of weeks there is a Yoga for Peace event at Tower Grove Park. I'm thinking about dragging G and the girls, the big question: Can I do sun salutations for an hour straight without falling over from exhaustion? Obviously, I could always stop and rest, but it might be an interesting event. I bet it would be an interesting people-watching event for G :)