We hope you'll enjoy visiting our online store and use this site as a valuable RV resource. Happy Trails USA RV Supercenter is located just northeast of Dallas in Rockwall, Texas on Interstate-30. Whether you're looking to purchase or rent an RV, need repair or service to the RV you already own or maybe find a new campground, you've definitely come to the right place! Happy Trails is a full service dealership...sales, service, rentals, parts and propane.