why is part only accessible by helicopter? Do you have a steep canyon or something? I'm not familiar enough with Arizona geography to get a mental picture. I would love to see a photo of what you are describing. The flowers sound really beautiful.
There's places 30 miles from us where gardeners have trouble planting because there are so many rocks in the soil. I have yet to find a rock of any kind on our property. We broke our backs digging big rocks out of a friend's yard to haul back here, and then we paid a fortune to have dump truck loads of river rock brought in for the driveway. They said we need 6 more loads, I said wait until I win the lottery.
Landscapers can easily charge $500 for one boulder here since they have to travel so far.