You forced me to think about it. Bear strenghts, Rhino Hide, Cheetah Speed, Cobra Reflexes... this all are aspects enchancing the creature. Eagle wings are so far only enchantement which actualy giving something (wings). Everything else is a boost of their actual performance. Are there any specific rules on that?
Turtle Shell, Porcupine Spikes or Fish Lungs would be other possible enchantements which will give something instead of boosting.
Does it have to be gorila? What about Grifin? Or levitation spell? Or realy big goblin catapult?
Mixture of enchantements in a transportation seems a relly good combo.
What about gorila transporting them to safety and then recast for more suitable creature?