We have been here since the May 18 and the only place I have heard about stomach issues is here on this forum about halfway through our trip.
I will type up a full trip report later but:
Stayed at Windsong
Hiked up to Veranda (one of the original hot zones?) for a lunch, food was fine.
We talk to every other person we meet and haven't found anyone that isn't having an excellent vacation.
Relax. Nothing but awesome is waiting for you here.