It's simple, it really is.
Eco Earth bedding, high humidity, 80%+. A hide, what I did is I went to wal-mart and bought the bottom of the clay pots, the thing you sit the pot on that traps the water(whatever it's called), turned it upside down but before i did, i made a hole and then i took 3 fingers side by side and came upward out to make an entrance, I put that thing upside down pushed it down, put more substrate over it then packed it and did any additional space mods to it, I used substrate about 4" deep cause I know emps like to burrow sometimes. I used a top of a butter thing as a water dish.
The thing on top is the clay pot bottom thing I was talking about.
If you really want to get into scorpions let me know as I at one point had over 10-12 diff species and I was breeding them and all and I'm fixing to get some extremely rare species, one species hasn't even been in Europe's pet trade and they're way more advanced then us as far as that is concerned.