I am trying to be polite and diplomatic here, but we just got back from US/IOA and staying at RPH for 8 days. It was a big headache for us with a peanut allergy in our family! As a whole, and I stress in OUR experience, they are not food allergy friendly. Yes, they will accomodate you but it just seemed like it was always a hassle. Beware, it seemed like peanuts abound.
Stay away from any of the multitude of buffets. Ask if they prepare or fry anything together with any peanut products. RPH since it is Asian infusion food, had peanut products in sooo much. Even many of the other restaurants serve PBJ for the kids, so we had to ask to make sure that anyone who touched it even to serve, keep our DD's food separate.
DD DID have an allergic reaction,we caught it early, after eating chicken nuggets and french fries at Hard Rock Cafe. Don't know what the deal was, but it wasn't a good situation. That was our first meal of our trip, so it was almost a blessing to be twice as aware.
If they offer you info. from the manager of chef, I guess they are trying to be accomodating, but it was always made a big deal of at our table in front of everyone which totally embarassed our DD all the time. She is just at that age. We tried a lot of different places to eat but then stuck to what we knew was safe and good.
Good luck!