I absolutely recommend staying at the Sheraton. You can park your car near the Red gate. From there you walk over a couple of hundred feet to the examination buildings, saves you the hassle if you are carrying a load of books. Also, you can walk back to the hotel for lunch and avoid getting in line for the two food carts on site. The hotel rooms have microwave ovens so you can heat up something. Somehow, they close the restrooms inside the testing center before lunch. There is only one restroom outside which is latrine style, and the line is long! Bring a seat cushion, about 1 of every 3 chairs has the seat sagging from the weight of thousands of examinees before you. You don't want back pain to distract you from your calculations.
I am not absolutely sure but I saw some examinees park at the Sheraton Hotel Parking lot the morning of the exam and walk over to the exam site, thus saving on parking fees inside the Fairplex. It's your risk if you choose to do this, the hotel may have a guard or a closed gate at the entrance. There is a table where they ask you to leave your cellphone but it's better if you just leave it in your car or hotel room. 'nuffsaid.