Business Insider's Monica Humphries spent two weeks traveling around America's west in a camper van. Around every corner, she discovered hidden costs like paying for showers and eating out. Before embarking on a two-week van trip, Monica Humpries had romanticized the lifestyle. She pictured waking up in breathtaking places, spending weekends isolated in nature, and seeking out spontaneous adventures. She also pictured a full bank account. Humphries naively assumed that once you had your van and shed unnecessary possessions and the burden of monthly rent, there wouldn't be many other costs to consider. So when she picked up her rental...