First, turn just into Kazooie. Go to the jump pad with Kazooie's foot print behind the closed ticket booth (near the mother bear that is looking for her children). Jump on it, but head towards the fence and go around the ticket booth. When you reach the full point of the jump, have Kazooie flap his wings and go towards the fence. This may take a few tries, but it will eventually work. You have to go to one of the posts. Note: This will not work when Banjo has Kazooie on his back.

You do not have to use Kazooie to get past the fence. Just shoot a grenade egg at the center fence and it will blast off.