Should I know anything else about crested geckos?

Sounds like you have a great setup! You have done a great job of getting everything ready for your new pet! Make sure they have enough climbing structures. Two females (or male and female) would be fine together in that amount of space. Crested Geckos are the best first time reptile and I recommend them for everyone. One last thing you should remember is these buggers do a great job of escaping. Especially when they are tiny. So make sure to always keep their terrarium secure.