i havent noticed a difference in speed, or arrows hitting higher on the targets. as for (people) getting disqualified at the bottom of the mountain, there are scales available at the check in tents as well as chronographs. that being said, if you are running that close to the edge, be it weight of arrows and bow weight, or speed, that is the risk you take. at that point in the game i see no reason to risk getting dq'ed after the effort it takes to get there......

the only real difference i see at that altitude, 4848 feet, is a little thinner air than that back home, elevation 760 here....