We have done this trip and loved it. I think you can get away with a lot less for extras on this one. At the Grand Canyon, we did a helicopter ride in our free time - very expensive- but many people just hiked a little bit on their own, and in retrospect I would have preferred that. We also did a horseback ride in the last area, but easily could have done some exploring on our own there too. The meals on your own are not very costly - there are many options, and you can do something low key (for me, it was different than being in Italy, for example, where I didn't want to "waste" an opportunity to eat at a real Italian restaurant). It's a great trip, and Disney does a fantastic job with making it wonderful. The mornings on the canyon rim watching the sun come up don't cost anything extra, and they are priceless!