C.W.
I make a big deal out of having a babysitter over, that they will be playing with them and how exciting it is. We usually get a "special dinner" of pizza or happy meal if she is giving them lunch or dinner. Usually the babysitters know how to distract them by taking them from us. Be prepared for some crying to make you feel guilty, just know that it usually stops as soon as you are in the car. I used to worry about bedtime too, but I found that they actually did better for the sitter, go figure. I just let her know the routine a head of time. Have fun and enjoy yourself!