Stay at the Hilton and walk over with all the others you see downstairs in their suits. May even see a few in the bar getting dinner. 5 minute walk to the security gate. I recommend a practice walk the day before to get the timing right. The front desk at the hotel will store your luggage for you until it's all over.
La Quinta is another three blocks further from the gate. Two guys decided to take the shuttle over vs just walking the 8-10 minutes and were late.
Be early, DON'T BE LATE!
Renaissance is just down the way, too.