My wife took PMBR, which she found very disconcerting. Regardless of whether PMBR's substantive training helped her, her confidence loss near the end of the studying cycle was very stress-inducing. Stay in the Hotel. It's a little costly to rent a room, but I cannot imagine dealing with exam stress AND traffic stress. You get no bonus time allotment for accidents on the 880.
Lower Floors Are Better.
The elevators are a mess during the exam. First, they become completely overloaded immediately prior to and after exam sessions, making for long delays. Second, they are crammed full of freaking-out exam takers. It's not pretty. The stairs are the only way to go.