Nope. You can move without having to worry about a AoO, as long as you don't move towards the wolftroll.
Caerth can move through the square with the stalagmite in it (costs two squares) next to the square he's in, then diagonally down the slope (costs one square), and then diagonally up the slope (costs two squares). That would be a total of 25 feet of movment. Since Caerth is hasted, he should still be able to take a standard action after that.
EDIT: Never mind... you had Caerth wildshape into a bat.