EzekielRaiden
Follower of the Way
Going to second @Tony Vargas's words here. One: if you really hate TPKs, and really hate fudging, you're either going to have to reconcile those two tastes, or put on the "kid gloves" while playing 5e. 5e does not provide a solid, reliable metric for difficulty. It provides an intentionally loose, approximate guesstimate of difficulty, and sometimes (not always, but more often than *I* like) the difference between the PCs curbstomping and getting curbstomped is solely up to the fickle dice. (My own 5e group is consistently pretty unlucky, while the DM has been substantially luckier. It's super frustrating.)
Two: If the players are hurt/pissed/sad about losing their characters, follow the advice others have come up with and turn this TPK into a new plot point. Being shackled with lycanthropy and trying to find a way to break the curse is a great option. Another could be...maybe their souls are stuck, halfway between life and death, and they must find their way back to the world of the living before their bodies become too damaged/decayed/etc. to accept their souls back. Or perhaps they were recovered by a friendly (or "friendly"!) third party, who also had a bone to pick with the druids, and their rescuers now demand "payment" for saving them from certain death. Regardless of how you go about it, turn this unfortunate situation into a challenge rather than a disappointment.
Two: If the players are hurt/pissed/sad about losing their characters, follow the advice others have come up with and turn this TPK into a new plot point. Being shackled with lycanthropy and trying to find a way to break the curse is a great option. Another could be...maybe their souls are stuck, halfway between life and death, and they must find their way back to the world of the living before their bodies become too damaged/decayed/etc. to accept their souls back. Or perhaps they were recovered by a friendly (or "friendly"!) third party, who also had a bone to pick with the druids, and their rescuers now demand "payment" for saving them from certain death. Regardless of how you go about it, turn this unfortunate situation into a challenge rather than a disappointment.