Mary, like you, I live in Wisconsin and I think that we are "between fare sales" right now. I don't know when you are planning to travel, but LAS is often available out of MKE at decent fares via NWA, Midwest Express, Sun Country and various charters. It is worth a little extra to fly out of MKE when you add in hassles, parking fees, etc. If you've got some time, I would hold out on booking until a deal comes your way because it almost certainly will.