Depending on the price, someone will do it. But as said on here countless times, experience says it is a bad idea to do an overnight with someone new. So although they might do it, you should not. Instead of a RB, ask a regular (or at least someone you have fucked once).
If you are determined to go down this route, put in the comments that you will book her for one hour first and she should bid for this too. Then do this. That way you both can make sure you get on before you are stuck with each other for 12 hours.