When playing Lewis & Clark: Uwe Rosenberg, a promotional card for Lewis & Clark, place one primary resource from your boats on it. At the end of your next Camp phase, after your Camp token has joined your Scout, take this resource back on your boats with one extra resource of the same type from the stock.
When playing Lewis & Clark: Bauza & Cathala, the active player takes randomly from the stock two primary resources per player. He can keep up to two resources for himself, placing them on his boats, then he gives the remaining resources to the player of his choice. This player takes up to two resources for himself, then gives the remaining resources to a player of his choice who has not yet received resources from this card. This process continues until all players have had a chance to take resources, at which time any remaining resources are returned to the stock.
When playing Lewis & Clark: Martin Wallace, you can move your Scout two spaces backwards on the route, then take one Canoe or one Horse from the stock. You cannot move your Scout further than St. Louis.