only if your removing mud by throwing it away from the pit, but the catch 22 is that its illegal to operate in wetlands, swamp, bogg and quagmire with an ORV that includes Hovercraft
(e) In a state game area or state park or recreation area, except on roads, trails, or areas designated for this purpose; on state owned lands under the control of the department other than game areas, state parks, or recreational areas where the operation would be in violation of rules promulgated by the department; in a forest nursery or planting area; on public lands posted or reasonably identifiable as an area of forest reproduction, and when growing stock may be damaged; in a dedicated natural area of the department; or in any area in such a manner as to create an erosive condition
, or to injure, damage, or destroy trees or growing crops. However, the department may permit an owner and guests of the owner to use an ORV
within the boundaries of a state forest in order to access the owner's property.