Alan,
Only two weeks? Won't be nearly enough time.
I'd probably be inclined to drop Juarez from that itinerary; I think you'd be better served to try to find four or five days to spend in the San Diego area, and hop across to Tijuana from there; it's a couple of minutes in a shuttle bus. If you drive into Mexico, you may have some insurance issues to address wrt the rental car, so check that out beforehand.
Apart from Tiujuana, San Diego has the Balboa Park, Old Town, and maritime museum as good places to spend more than a minute or two, but I digress.
Vegas: If you've not been there before, then it's the sort of place that you should visit so that you can say you've been there. Otherwise, it has no redeeming qualities whatsoever, IMHO. They have casinos. So do we. They have pokies. So do we.
They have Celine Dion. Thank god we do not!
It's basically a nothing place; lots of fake everything ...
That said, Hoover Dam is nearby and good, but there's also a new roadway that's downstream from the dam. Bypasses the dam and improves travel times, but you don't get the chance to stand in two timezones simultaneously.
Head into Arizona (your Glock will be welcome) and go to Williams. They make great play of the fact that they're on the old Route 66, so spend a night there and enjoy the show.
And from there, you're about 90 minutes from the Grand Canyon. Good for a stay of five minutes, or five days.
Head into New Mexico, take that left turn at Albequerque and spend at least one night in Santa Fe; three would be good. Great food, great sightseeing, great antiquing.
Turn left again at Albequerque, but this time the road will take you to Dallas. Sixth Floor Museum documents the rise and fall of JFK; it's a great museum. Dallas isn't the greatest tourist destination, but the food there is great; take in the atmosphere and fooderies on Lower Greenvile.
If you want more Texas, head to San Antonio and The Riverwalk, or perhaps to Austin, which is the best music town in Texas.
Heading east, your next stop would be N'Awlins. What time of year will you be there? Jazzfest is the last weekend of April (when I hope to be there) and the first weekend of May, and is highly recommended.
For food ... I try to avoid the places that get mentions in the tourist rags. Crescent City Bar on Decatur is a good Brew Pub with good food, Mothers is just wonderful, or just wander around and see what takes your fancy.
For my trip this year I'm thinking of flying in to Memphis, and then taking the Blues Highway (Highway 61, but not revisited, for me, on this trip) in to N'Awlins.
I've not done Georgia or the Carolinas, so I cannot offer too much advice on those areas, but you have choices of heading up to Memphis (Gracelands, STAX), and then east, or heading east towards Florida and then north.
DC is definitely a must, but again, you could take just two weeks and only take in about half of what the Smithsonian has to offer, and you'd still want to visit the Newseum.
To expense this out ... lots of photos, blog extensively ... get yourself some sort of Android phone and a netbook (buy the netbook in LA), and get a T-Mobile SIM before you leave. That should give you good mobile coverage, and a working GPS. Most hotels provide free WiFi, so you should be covered there.
With your local CAMS creds, can you get reciprocal creds at CSTL races in towns you may be passing through? That could be a bit of fun, and help to legitimise what you're doing.
Be prepared to pay for overnight hotel parking for the pony car in N'Awlins, DC and NYNY. Most other places that should be free.