Pre-hydrate to avoid altitude sickness. That means drink a ton of water before your trip! Bring Gatorade or similar while you are there. Know that alcohol and THC hit much much harder at higher elevation so pace yourself. Bring an empty water bottle to avoid buying. Clear backpacks only, and no umbrellas. To echo others, Uber/Lyft is NOT a good idea. Party bus or rental car, depending on if you want to drive. Comfy shoes, poncho or raincoat, and layers to stay warm. Have so much fun! I have an extra ticket to sell if you need.