Trapper is a type of merchant in RDR 2 that deals with the skins of wild animals. In particular, he loves the skins of legendary animals, and can also create custom items for you if you bring him the right ingredients. In addition, the trapper can make special quest items for you, which most often give good bonuses. Finally, he sells some hunting supplies, so visit him from time to time.
Where to find the trapper
He can be found in several places throughout the game map - the merchant will be marked with a paw icon. Below you will find maps with exact coordinates.