I was just going to say that I knew a guy that did helicopter logging. They can get pretty high in elevation now days. When I'm out hiking I am seeing more logging roads at 8 and 9000 ft. I am sure there are some higher than that too.
Alice came to a fork in the road," Which road do I take"? she asked.
"Where do you want to go"? responded the cheshire cat.
"I don't know," Alice answered.
"Then," said the cat, "it doesn't matter".
~Lewis Carroll, Alice in Wonderland