Keystone RV Co., Elkhart, Ind., has added the feature-packed Big Sky fifth-wheel with redesigned radius front and rear caps and an “arched” roof to its best-selling Montana lineup. Available in three 36- and 37-foot quad-slideout floorplans, the Big Sky’s upgraded amenities include high-gloss, gelcoat fiberglass sidewalls, pass-through storage, polished aluminum wheels, deluxe air-mattresses, hide-a-bed sofa, pewter fixtures, electric fireplaces, textured carpet and marble shower enclosures. Keystone rolled out the new Big Sky fifth-wheel during the National RV Trade Show in Louisville, Ky. Retail prices start at $58,670.