The vibe can seem more camping-community than Burning Man bohemia.

And yet, despite the jokes and comparisons to trailer homes, RVs are now being reimagined from the outside in—often at extraordinary cost. Some of these mobile mansions offer more creative amenities than your average Hamptons home: tanning beds, upright pianos, misting devices. Below, a look at what comes standard on $1 million RVs—and what you get for an extra mil or two.