help please (first eggsack)

Hi all ,got my first eggsack,dont have too much of a clue as too how long before eggs with legs ,should I do manual incubator.
Gammostella rosea, for the longest time I thought she may of been too young ,she was with the male before Christmas.
So far I have decided to keep it with her but they are in vermiculite and may be on dry side if it is more advisable I will do manual.how often should the sack be rotated?Main reason for leaving it with her>also any guess as to how long to wait to see?-to open? Thank you

I wouldn't worrie about her being to dry, she is a desert sp. If your worried about you could give her a light misting once a week