Best way to help her is to keep her full of food and maintain proper temperatures.....although sometimes females will go off their food for a while during their gravid-cycle.
She won't be spending time in the vermiculite hide until she is about to actually lay the eggs.........just make sure she knows it is there and that it is easily accessable.
Also, you might want to separate them to reduce stress and prevent the other geckos from entering the hide and trampling the eggs.
Make sure she has access to a Calcium Dish at all times too.
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2.4.0 Leopard Geckos
0.1.0 California Kingsnake
0.1.0 Copperhead
1.1.0 Eastern Box Tutles