Two words: ear plugs.
I’m also a very light sleeper. Several years ago I started experimenting with different brands because A. DH snores and B. I never sleep well in a new place the first night, esp when it’s noisy. I suggest you get used to using them well before your trip. Try different kinds for a good fit, because they do take some getting used to. But once you you do, and you’re putting them in correctly, the difference in sleep quality is amazing. I now wear them almost all the time. When our cats decide to serenade us outside our bedroom door at 2 am, I don’t hear it. And I’ve found on trips, that as long as the bed is comfy, once I have my ear plugs in, it feels very familiar and comfortable to me and I can fall asleep much more easily. I stayed at BWPPI last September, the room right behind the office, and it was super noisy from passers-by. But once I put my ear plugs in I couldn’t hear a thing.
There are several kinds; I use soft foam ear plugs. There are smaller ones for kids or if you have small ear canals, different densities of foam- the very dense industrial type hurt my ears, but softer ones don’t. Don’t wear a pair more than a few times, so they are clean and spring back correctly.
One of my DDs can’t get used to them, but she does all right with a small fan (sometimes the hotels have ones you can use) or a white noise app or machine.