2025 Forest River Sandpiper 3800RK, The 2025 Forest River Sandpiper 3800RK is a luxury fifth-wheel RV known for its spacious rear kitchen, ample storage, and high-end features. It's designed for comfortable, full-time RV living, with features like a walk-in bathroom closet, theater seating, laundry room and an exterior cooktop. Has 4 slide-outs and 2 awnings.