Thank you Gary for the report back from your friends. LONG I can understand. There's no way around it...an 18 hr days will be long and exhausting. Boring? I'm a geologist and my husband has been down the Colorado River multiple times, so I think we'll enjoy the scenery. Six hours of train ride each way will be somewhat redundant but it will be different light and hopefully beautiful weather! It is THE reason for us to take the cruise, so we'll let you know what we think when we get back.
Our philosophy has been, "It's hard to have a bad day on a cruise ship." We'll see about the day we're on the train
I'm sure the rest of the cruise will be fabulous. I'm really excited about this as it was such an unexpected opportunity!! Thank you all for your replies.