Some Grimtotem joined Baine and the other tribes in Cataclysm. They are being led by Jevan “Stormsong” Grimtotem.
As for the tribes, they’re all distinct, but the lore on them is scarce. But we know that the Thunderhorn tribe are some of the best hunters, Ragetotem some of the best warriors, Runetotem and Wildmane are Druids, Bloodhoof are the leader tribe, Skychaser tribe is basically Kalimdor Skyhorn tribe who ride wyvern, and of course the Grimtotem tribe.