I've done similar embarks. My favorite was on a glacier that totally lacked any trees or plants. My grazers had to be butchered quite soon, and it was a trial moving everything inside and surviving with only the two beds that the deconstructed wagon could make (I hate that beds cannot be made of anything else - if I had my druthers all beds would be constructed with a piece of cloth/leather bedding and a frame, the frame being made of wood, stone, metal, glass, or ceramics). No smelting could be done at all until I found magma, so the only crafts that were possible were cloth, stone, and bone. Bone came from the hunting, which was excellent indeed - many wolves, elk, reindeer, and others moved through the area. Farming went almost entirely to brewing, since I had no source of water. I eventually discovered I had no iron, and the most valuable metal on the map was either silver from tetrahedrite, or brass. This wasn't all that bad since I could trade for steel, but even this was fairly limited since only dwarves traded with me.
Eventually it wasn't all that hard after all, because I trained my miners by vacating every level of soil, which became covered with fungus as soon as I found the cave layer. More than enough wood now, so everyone gets a technicolor bed. But man, were they unhappy about sharing 12 dwarves to a bed for a while. Eventually I had to make do with what I had excavated and nothing else, because of a siege above ground and 5 FBs in the caves. Walled myself in and tried to make a go of it. Three legendary fighters using all steel gear from previous trades dispatched everything. 20-some dead goblins and bats and trolls, and all 5 FBs dead to these three, completely uninjured dwarves. Danger room for the win! At this point there was no reason to hunt because they had about 12 years of meat and tallow from the FBs, and the game got boring.