Quick tutorial on how to make prime meat stackable in single player or non dedicated servers may work in expertmode on regular servers as well.
ConfigOverrideItemMaxQuantity=(ItemClassString="PrimalItemConsumable_RawPrimeMeat_C",Quantity=(MaxItemQuantity=99999,bIgnoreMultiplier=True))
ConfigOverrideItemMaxQuantity=(ItemClassString="PrimalItemResource_Ambergris_C",Quantity=(MaxItemQuantity=99999,bIgnoreMultiplier=True))
ConfigOverrideItemMaxQuantity=(ItemClassString="PrimalItemConsumable_RawPrimeMeat_Fish_C",Quantity=(MaxItemQuantity=99999,bIgnoreMultiplier=True))
ConfigOverrideItemMaxQuantity=(ItemClassString="PrimalItemConsumable_RawMutton_C",Quantity=(MaxItemQuantity=99999,bIgnoreMultiplier=True))