If your snail is gold in color it is either a pomacea bridgesii or cana. Canas will devour plants, brigs will not.
Oftentimes first clutches are "practice" and won't hatch. Even that small a clutch contains about 100 eggs. If you're concerned about the number, it is much kinder to freeze the clutch and dispose of it than be ill prepared to take care of so many. Snails are MESSY! :)
I've never had success with the ziplock bag method but float them on styrofoam in a breeder net. I believe Fish4all is following this now too. The earliest they will hatch out is about 8 days in perfect conditions; they will always hatch by 4 weeks. Mine typically are about 20 days.