Sharlotte and Aunt Steve cover a whirlwind stretch of their road trip—from Kansas City to New Mexico, Arizona, and Las Vegas. Along the way: a science museum inside a train station, climbing through slot canyons, messy milkshake moments, and a very strong opinion about In-N-Out Burger. Plus, they share what it’s really like grocery shopping and doing life on the road—before heading off to their next big adventure: the national parks.