It all depends on the country and type of tour (what exactly you plan to do). Of course you need an indemnity clause for yourself as an organizer of the tour. Also, I am not from the US so I use Canadian insurance
I am currently in the process of "chewing " through many law rules for my tour to Patagonia to make it safe and credible. These rules tend to change and it is best if you speak local language of the country you organize your tour in. Stay tuned! Will try to remember to send you details in private message when I am done chewing over it...
Also, Greg Boratyn and Mark Metternich might be a good source for this information for Patagonia. They have already advertised their tour there so they must be familiar with the process, too.
My tour won't be a standard one: jump to car, walk 1km, take a photo, go back to car.... so my permits etc by default will have a special complication.
My words are redundant. You were there for one of those life defining moments and captured it to share with others. Thank you.
I've tried to examine the EXIF of the photo (via Firefox) and can't get any information on the pix. Obviously there was a slow shutter speed and a narrow aperture. Past that, what else did you do? While I don't get landscape as dramatic as this I often am trying to work with morning/evening sun and passing storms. Any advice greatly appreciated.
Thank you everyone for comments and choosing my image as FTOW.
@ Gary. Thank you and I'm not posting anything this week
@Robert. Thank you. I'm always happy to share unique moments that I capture in my photographs. For me that is the essence of photography.
This image is a stitch of two images to showcase the beautiful sky (I'm not 100% sure about almost square crop here but I really wanted to include unique sky and clouds).
Both images were shot at ISO 500 , f 5.6, the land and river 30 sec, and the sky 25 sec. In Lightroom, I processed the images multiple times for the land and the sky( for the land to recover the details and to darken the sky that was much brighter in RAW than in reality). In photoshop I stitched images by hand (align images and paint in with the brush) and applied a little of selective dodge and burn. That is all.