My wife and I are visiting Las Vegas and we were lucky enough to score two spots on the full day tour. If you're planning on doing this tour, book it NOW! Seriously, don't even think about it. I'm glad I did and did not wait for my wife's sandwich choice (made it for her) as Blazin' Paddles were able to get the last two permits for the Hover Dam that day (the government only gives a very limited amount to all of the kayak companies). Anyway, we had Greg as a tour guide and he was awesome! He took us to all different caves, climbed through the dessert, went to numerous hot springs, hung out with some ducks (who appeared to know him somehow), and learned about history of the canyon. If you can handle the length of he trip, which wasn't bad at all for us, I highly recommend it. Otherwise, I would definitely book one of their other tours as the company is very easy to work with. They have speedy, friendly, and professional customer service all around. P.s. I very rarely write reviews, so that in itself says a lot.