First, the distance from the north tower to the south tower isn't much so if you end up on the wrong side, it's not too far of a walk and it is all indoors. I have bad knees so I try to reduce my walking distance but it's not that big of a deal. There are two driveways. The up hill driveway is for drop off at either tower front door and valet parking is available from about 6am thru ??pm. There is a sign for which door has the valet parking. Normally it's at the north door but right now (Jan 2020) it's at the south door because of construction. The distance between the two doors is only about 50 yards. Valet parking is nice and the place isn't that big so you wait only 5 minutes or so when you are ready to pick up your car. To get to a front door from the parking garage, you'll want to go to the level 2 door.
Definitely use valet! It's free! (Tips are appreciated if you're satisfied with your service, but a buck or two is adequate). Pull into the upper drive ... they're at the entrance of the North Tower.
Park o the 2nd level of the visitor parking lot and walk across into the north tower. Also, valet is there by 0545 at the North tower and will park your car.
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