I'm not sure when you are going, but we'll be in Vegas 10/17-10/22 and we're taking a combination tour which inlcudes a helicopter ride to the GC in the morning followed by a Colorado River rafting tour in the afternoon. It's a 10 hour tour and the cost was $309 per person thru Papillon. A co-worker took this tour about 4 years ago and absolutely raves about it. I've read mixed reviews about all of the tour operators on the message board, so even with my co-worker's enthusiasm, I'm still a bit nervous. I'll let you know how it went as soon as we return.