For Sale: Rear Double Bunks. Travel Trailers / Kalispell, Mt 2014 Keystone Rv Passport 2910bhwe Go Anywhere. With Customer Demand For Lightweight, Fuel-efficient Travel Trailers At An All-time High, The Passport Ultra-lite Finds Favor With Families Who Want To Maximize Fuel Efficiency But Maintain All Of The Conveniences Of A Well Appointed, Feature-packed Rv. You'll Never Want To Travel Without Your Passport.