New 2026 Outdoors RV Creek Side Mountain Series 21RBS Travel Trailer

Why We Chose This Creek Side Mountain Series 21RBS

We selected this specific model because it is the ultimate compact floorplan for adventurous couples who refuse to compromise on rugged utility. Built right here in the Pacific Northwest on Outdoors RV's signature custom-engineered mountain chassis, the Creek Side 21RBS features a massive U-shaped dinette slide-out that opens up the entire living area. Combined with thermal pane windows, a fully enclosed heated underbelly, and factory-certified four-seasons block foam insulation, this travel trailer is built to withstand everything from freezing mountain passes to hot desert boondocking.

Highlights of this Unit:

• Spacious Couples' Layout: Features a deep slide-out with a comfortable U-shaped dinette, a full rear bathroom with excellent storage, and a private front queen bed.

• True Mountain Tough Build: Constructed with a rugged, independently certified structural steel frame and heavy-duty suspension designed for rough backcountry roads.

• Off-Grid Basecamp Ready: Equipped with high-capacity holding tanks and advanced solar preparation to keep you completely independent far from the crowds.

The Sumner RV Difference

When you partner with Sumner RV, you are joining a 60-year legacy of integrity. As a family-run dealership hand-picked by the Nash family to carry on their tradition, we prioritize long-term customer relationships over transactional sales. To guarantee your absolute peace of mind, we invite new owners to spend their first night right here on our property along our year-round salmon creek—ensuring you are 100% comfortable with every feature before you head out to see Mt. Rainier.