For Sale: This Shasta Oasis 26db Is Available At In Sherman/north Texas . Travel Trailers / Sherman, Tx 2015 Shasta Oasis 26db Oasis Has Room For The Whole Family. Even Enough Pass-through Storage To Take Along The Extras. That Means You Can Get Away Whenever The Road Calls. Every Inch Is Carefully Planned For Ease, Roominess And Comfort Like The Big Double-door Refrigerator. You'll Love All The Features You Get At This Price.