Take them all!
When I'm out there, I use this range and even longer and shorter. Don't limit yourself to one end or another since the scenery is dynamic and not just a wide, medium or long kind of place, especially if this is a rare trip for you.
Also, if you have but one lens, if you to suffer a glitch, you'll wish you had back-up for your now electronic "brick". A second lens at a minimum is SOP along with a second body and extra batteries and media cards.