When the coast is finally clear, check the locked area with barrels around it to find a stone dais with eight different symbols. Be sure to also grab the Yellow Herb down here as well. Burn the Ganados to death, and none should sprout any infestations.

You can try leading the group down in the pit below the upper path, and look up for a red lantern you can shoot down to light everyone below on fire. Move up to the top of the path to take out the dynamite thrower before he can harass you by shooting his dynamite, then double back down to the lower area where another small group of Ganados with molotovs should appear. You can also take the high path first, taking out the molotov throwers as they appear, and glancing back to knock down anyone trying to come up the ladder one at a time to knock them below. Even worse, the large group of enemies from the high path will come around behind you to ambush which can make fighting on two fronts difficult. The lower route has less enemies at first, but a dynamite thrower on a high ledge overlooking the path can be a pain to deal with. When you reach the fork in the road, be sure to go left quickly to unlock the door back to the boat, giving you more room to escape.

Wait for another small group with more molotovs to show up, then carefully press forward. Try to shoot it out of their hands if possible to eliminate them quickly, as it might be hard to maneuver them into hitting others. More Ganado are just up the path behind the first few, one will be throwing dynamite and the other further back will come support with molotovs. A few Ganado will start patrolling down the path towards you, and a few of them will likely sprout parasite heads after being damaged, so be ready to backpedal away from them or toss out a Flash Grenade if you have extra.

Treasure map resident evil 4