It may at least be more safe than the puppies wandering about alone. As you said you don't have an animal-shelter in your area, does anyone near you have a dog, perhaps even one who's had puppies before, or currently has any? If yes, bringing them together may be good for the socialisation of the puppies.
If you can, also offer at least dry food over the day. Usually, I would say wet food would be better for the puppies, but from the impression I get, rodents and insects being drawn might be an issue if you leave out wet food. Dry food should cause less trouble in that area.
And, yes, I agree with user508439: find them a home as soon as you can, they NEED social contact and someone to teach them how to behave.
Best wishes to you and the puppies!