@herself I've done a decent amount of traveling with only camera and iPad Pro. It definitely worked for me. A few considerations for you: which iPad Air? Hopefully an M1 processor? How much storage does it have? 64gb or 256gb? Will that be enough for your use? This is especially important if you're shooting in RAW. I don't think it'd do RAW photography on a trip with only a 64gb iPad.
Are you only sorting photos or also doing processing/editing on the go? Is there a photo app that you are already comfortable using on the iPad (whether that's Apple Photos, Adobe, Photomator/Pixelmator, or something else)? If your iPad Air is not an m1, you can expect the photo processing to be slower.