Are you staying your whole trip at Aria? If not, what hotel are you staying at the other days?
We for sure are staying in the Hosp. Suite Thurs. and Fri. (wedding is Fri.), but we'll be staying in Vegas. Wed. to Sun. so will either get a cheaper room at Aria Wed. and Sat. or stay at a completely different hotel, however, I feel like that may be a hassle. But on the other hand, Aria isn't the cheapest hotel, so FI says if it saves us even $100 we should stay somewhere else.
I also have a feeling not a lot of guests will stay at Aria due to the price, if it's the same for your guests, where are most of them staying?