How do long-haul truck drivers in the U.S. find parking spots?

The most annoying part of long-haul driving isn't the driving itself, but not being able to find a spot at night. Newbies often mistake service areas on the GPS for lifesavers, only to arrive and find them completely full, forcing them to keep driving and burning through their ELD hours. I usually start looking for my overnight stop before noon; I don't wait until it gets dark. If I can book…