I must be extremely lucky or in good shape when I did it.. but 14,000 wasn't that big of a deal. Yeah... Walk then stop, walk then stop for a while, but then things just clicked over and no worry. This was after a 10 mile hike up the hill and all.
On a moto.. yeah I could see the bike straining... No worry on the headaches etc.
Have a great adventure and bring back pics!
"And if we have food and covering, with these we shall be content."