As for altitude, there's actually a thread about this from several years ago that might give some hope and guidance. We also have a regional support group in Denver that may be able to offer some tips and advice. Also, while we hope that you won't need it, oxygen will be available at the conference for everyone. Please bring a regulator, mask, wrench, and whatever else you use as we will just be supplying the tanks. Please bring your items even if you are not in cycle just to be on the safe side. https://clusterbusters.org/forums/topic/577-altitude-effects/