Another method we often use in addition to toothpicks and super glue is simply letting the corals attach naturally. Just take some crushed coral or rubble rock, fill a small deli cup with it about half full, and toss the frags in. The sides of the cup will keep the kenya tree from getting blown away, and it will naturally attach to the crushed coral, or the rubble. Works real good for mushrooms and ricordea which don't respond as well to gluing or tooth-picking.
Best of luck!!
Steve