When I moved up to 7000 feet (Steamboat) from almost-sea level (San Antonio), I got out of breath easily for the first couple of weeks, so take it slow. The more immediate symptoms that you’ll want to manage are light-headedness, fatigue, headaches, and kind of a fuzzy feeling in your brain (or that could be the hooch!). Like everyone else said, drink lots and LOTS of water, eat a banana, and take lots of deep breaths. Don’t forget to bring Tylenol or something similar to “break” those stubborn, persistent headaches. Take it easy on the alcohol.
Once you’re used to the elevation, though, you’ll have a fun “superpower” that lots of people don’t know about. For about 4 days after you return home to a lower elevation, you’ll be able to drink everyone under the table because of all those extra red blood cells your body’s produced to adjust to the high altitude. It’s a fun side-effect!