EV
For me, it did not work out that way. Many years of 8000 ft cabin alt, then we went to Colorado for a ski trip at a resort that was a liitle over 10000 ft (Breckenridge) and the ski area went up to around 13000 ft. My wife and I had similar symptoms: both almost knackered by the time we had got the ski kit on and up to the lifts, but the skiing itself was no problem. We both had poor sleep, and headaches - not alcohol induced, either. Perhaps 2 weeks was not long enough to acclimatise.
But - everyone is different. That was just my experience.