Congrats!

Be prepared, if she laid one she will probably lay more. They usually lay 2 at a time. Lots of people out there do not use incubators for crested geckos and it works out fine for them. I talked to multiple breeder though and they said lower incubation temperature have proven to produce better crested geckos (structure wise). If you have a place that stays 70-73 degrees that would be perfect! It will take longer for them to hatch at this temp, but will be worth it in the end.

Good luck and keep us updated!