New 2026 Keystone RV Springdale Max 31SUNROOM Travel Trailer The 2026 Keystone Springdale 31SUNROOM is a 35'11" ft travel trailer featuring a unique rear sunroom with panoramic windows, an L-shaped lounge, and a power-lift TV. It sleeps 4, has a dry weight of approximately 7,550 lbs, and includes a, 30,000 BTU furnace and 10.7 cu. ft. 12V refrigerator.