For Sale: Travel Trailers - Hybrid / Uxbridge, Ma 2015 Forest River Roo 21ss Whether You Are Interested In The Expanded Interior Space Provided By The Spacious Drop Down Bunks With Heated Innerspring Mattresses Or The Ability To Bring An Atv Along With The Feel Of A Traditional Trailer, The Rockwood Roo Will Deliver With The Quality And Amenities You Expect. Rockwood Has Redefined Camping By Allowing You To Have The Necessities Of Residential Living On The Campsite.