I plan on buying and using a p3adv in Colorado this summer. The base camp is at 8800 feet. Does anyone have experience in flying one at this altitude? I only plan on taking it up a couple hundred feet but that's 9000. Can I assume she will not have the same flight time and might act a bit sluggish based on the thinner air. On a positive note I should get great gps reception. Any suggestions or comments would be appreciated.