that bump under the radiator is the spot. I think it is actually a little behind the rad. for the jack stands I think the best spot is under the sway bar bushing brackets, the stock ones are pretty indestructable, and they lock into the the way most stands are shaped so there is no way for them to slip.
Usually if im changing oil I will leave most of the weight on the jack and just set one stand on the side im working, just in case.