If an RV doesn't sound like luxury accommodations, you haven't seen RVs lately. Will Smith's $2.5 million RV is reportedly two stories tall and has its own screening room. Country music stars Kelly Pickler and Kix Brooks have turned theirs into second mansions on wheels. Justin Bieber used to take Selena Gomez out in one belonging to Chris Brown. But even if you aren't driving a tricked-out bus to your latest concert or film set, there are ways to make your RV feel as luxurious as a rig tens of thousands of dollars more expensive.