Travel triggers memories for me as well - airports, hotel rooms, new bars etc. I know that sad pang, for me its of a life I no longer live.
But it is also for a way of living I no longer believe in. Being clear, aware and present is so much a better way to live, to experience new places, to see the world and be part of it. Drunk and immobile, hungover and fragile - goodbye to those days.
Good for you for checking in. Enjoy your trip. Savor the fact you can be a better version of your self sober than you ever could have been drunk.