Today, rotational molding is still a growing sector of the general polymer production. But to further improve on this process, the design and production of new products with better properties must be performed. For this reason, the development of polymer composites is of interest, especially when natural fibers are used. In this case, the addition of rigid particles leads to higher mechanical properties (mostly rigidity and strength) compared to the base matrix. Unfortunately, very limited information on the production of rotomolded composites can be found in the literature. In this work, an overview on the development of rotomolded composites is made based on the addition of natural fibres (hemp and maple wood) in a thermoplastic resin (linear low density polyethylene). From the sample produced, a complete characterization (density, morphology, and mechanical properties) of the final parts was done with respect to several parameters like fibre dimensions, concentration, and surface treatment via maleic anhydride copolymer addition in solution. From the results obtained, the optimum processing conditions (rotational speed, oven temperature, and cycle time) and composition were obtained for the materials studied. The production of hybrid composites was also investigated by using a blend of both fibres with similar or different sizes to further improve on the properties of the rotomolded parts. Finally, the composites produced are shown to be very efficient in terms of production characteristics by having reduced material costs and better looks.