Just don't go hunting in the swamp alone (Hopefully this is common sense). If you bring a decent raptor it'll destroy the sarco and even a carbonemys can do it on land. It isn't that hard to engage unless you're in the water. If you do fight it, just be aware of you're surroundings. I got attacked by two titanoboas once while fighting it. Didn't end well. However, my raptor killed all three of them by the time I got back. That's why I say raptors are great for mid level players going on a hunting trip.

More Sarco Encountering Tips