The GH one is the hall of the ice forge. It is in Northguard in GH. Go across the stones that are in the river near the entrance to Mirkholm keep. It is in the cave.
For the Dragonspyre Crafting Station, you need to be able to ride the Young Drake to Malistaire's Dungeon. The Crafting Station is right outside of that instance.
The Grizzleheim Crafting Station is in the Hall of The Ice Forge at the back of Northguard, up near the waterfall.
Hey, here is a tip for the DS crafting stations. You are NOT buying a crafting station from anyone. To the right of the outside of Malistaire's Lair, there is a crafting anvil where you can craft things that are required for this type of station. I hope this helps!
