I think it will depend on what time your delivery is, and when you show up. The lot where they are likely storing most of the cars as they arrive is going to be pretty readily accessible to you. Problem being that you are probably going to have to park elsewhere and walk into the lot, for two reasons. First, lack of parking space. Second, they have people stationed at the parking lot entrance, directing traffic and greeting.
I have read varying reports of up to 38 delivery trucks arriving yesterday. That would indicate well over 200 cars on the lot. A quick calculation of approx 7.5 cars per truck is 285 cars. If you drop that down to 250 just to be conservative and subtract the approx 70 that were supposedly delivered to customers that would leave about 180. However, when I was there on Saturday around 4:00 there were probably at least 40 on the lot that hadn't been delivered yet, and there were trucks rolling in, including one unloading as I was leaving. I have to believe more trucks came in on Sunday. Point to all of this is that there are a lot of cars sitting around, and there is really no place to put them that's not accessible to the public, except in the make ready, service and delivery bays. There are approx 6 delivery bays, although I have heard that they're delivering in a lot of places outside of the bays during the push.
So, if you arrive long enough before your delivery there's a chance your car will still be somewhere that is accessible to you, since it's obvious that they are likely getting cars ready for delivery within an hour or two of their delivery time, at the earliest.
