Recreation expenditures of both on-site recreationists and recreation home owners (seasonal and permanent) include two major categories: trip expenditures and annual expenditures. Trip expenditures refer to expenses on food, transportation, lodging, and other recreation related activities during visits to the recreation areas on the Navigation System. While annual expenditures consist of outlays for boating, fishing, camping, and skiing for the entire season, they exclude the initial investment on recreation equipment. The expenditures incurred in the Oklahoma portion of the waterway for on-site recreationists and recreation home owners were estimated separately.