THE AGTA are one of the last Hunter-Gatherer groups in the world.     They live in Isabela, Philippines. There are aroud 30 camps of Agta people in that region. I stayed in a camp called Diago, which is the most beautiful place I have ever seen. The Agta are lovely people, and they like fishing, hunting, playing and collecting honey. The children love to play, drawing on the sand, swimming, and swinging in ropes.