2017 Flagstaff 21QBHW 14' Box Hard Side Tent Trailer 2017 Flagstaff 21QBHW by Forest River - HARD SIDE & HARD SIDE HIGH WALL SERIES QUITE POSSIBLY THE BEST OF BOTH WORLDS. When you combine the solid exterior of a travel trailer with a Classic tent camper, you get the Flagstaff Hard Side Series, giving your camping experience the best of both. Bringing a smooth, fiberglass vacuum bonded exterior with a quick, easy set up, while retaining the towing and storage advantages of a tent camper, the Hard Side camper is the perfect blend. EVER GET MORE THAN YOU EXPECT? That is what you get with the Flagstaff Hard Side High Wall Series. What appears to be another easy to tow, convenient to store camping trailer transforms into a fully equipped camper with many of the amenities commonly found in today's travel trailers.