I like the Battle of Moonglade as a pivotal, epic loss for the elves. What you wrote is similar to what I was thinking, and makes the "granddaughter of a celebrated war hero" family name even harder for her to live up to (as the grandfather lost the battle, her family is substantially poorer, etc). I don't think Moonglade Estate is a pivotal part of the current adventure. The Mages' Guild have their own mission for Tiana. She knows how to get to the estate as every child knows how to get home, but it's overrun with goblins and far from Boldenwald.I'll put Greyforge on the map, and Moonglade Estate can be around somewhere too. Maybe it is inland from here a way? Could it be one of the things you are trying to find?
With that said, I don't know where the elves actually are. I was thinking both them and the dwarves as far away from Red Oak. You did say there were hordes of goblins about.
After we have routed the goblins from Boldenwald and restored the bloodline of Boldenwald Kings to the throne, we can have Tiana lead the war to recapture Moonglade.
