Oh please don't think about it that way! You'll have yourself in a fit all weekend. Think of it this way: it'll give him a chance to miss you.
He hasn't found someone else while you've been S right? So, why would he find it somewhere else now like in Reno? You know your H better than anyone. When you really use your heart to think about this what does it tell you? When you've put all the negative thoughts aside what do you "know"?
I know how you feel believe me I do. My XH was planning on going to the beach with D and "friends" and all I could do was panic.
Try and do something tomorrow with your D to keep your mind off his trip. If you keep busy then the time will go fast and the wekkend will be over.
Jen *The more anger towards the past you carry in your heart, the less capable you are of loving in the present*