Not only that, but any equipment that he can wear as an Ape stays (which is just about everything except the armor and weapon). Get Wild Armor, and you can keep the enhancement and AC bonus of your armor, too. Hell, Wild armor ignores the armor check penalties, so you can wear Dragonhide Full Plate without proficiencies, and whenever combat starts, Wild Shape and get the huge AC with no drawbacks.
Since they've clarified that Su attacks can not be dispelled, as long as you don't wander into a AMF, you're fine.