There is an easy path to the place you need to go, it's in the black shroud through crimson bark. You just need to stay on the upper path and the only aggro mobs you should run into are 47-49 boars. And all drakes I've encountered are sound aggro, but piestes and drakes are two different types of mobs. Mor Dhona has piestes, not drakes, and piestes aggro to sight, so you have to run behind them. Patience is the key to not getting one shotted.