As I noted earlier, Death Valley is huge and even being the busiest it ever gets won't mean the sights are super crowded, except maybe Scotty's Castle (whch I would avoid as it can only handle a limited number of people each day).

But what will be full to overflowing are the few campgrounds, hotel rooms, restaurants, stores, gas stations, ranger stations, and visitor centers. You'll have a hard time getting any services in the park without a significant wait and the nearest other services are miles and miles away.

But go for it if you want to. To maximize your touring, just make sure you have a rental car which has a large tank, buy a cooler and picnic goods, and take your own food and drinks with you.

If you rent a 4wd vehicle, are a moderately experienced off-pavement driver, and have a GPS with maps, try coming into the Park from Big Pine via Ca168, Waucoba Road, and Death Valley Road. It will be the highlight of your trip. I guarantee that won't be crowded but there are no services -- or even buildings, electricity, or cellular service -- for maybe 130 miles (200km). Do not accidentally turn off to Saline Valley.