My partner and I hunted with Greg in 09 and scored on two big muleys in two days. If you want to hunt BIG game especially in Nevada you owe it to yourself to give him a call. The animals he's put hunters on year after year is pretty amazing.
Pretty reasonably priced too imho... I'm not one for guided trips, but I'd sure love to get advice on what areas to scout from him if I ever hunted AZ or NV!