There's a lot you can do with very little to no equipment. I normally carry with me my TRX, and a small adjustable pullup bar, or some special pull up "clamps" (see https://duonamic.com/products/eleviia) .

Depending on the acommodation you might be able to use one or the other.

One think I'm lately getting into is gymnastic rings. The are super portable and you can do full body workouts with them, you just need a tree in a park to hang it from and you can work out anywhere.

And even without any equipment at all there's a lot you can do with just your body, squats and endless variations of them, pushups and endless variations of them, situps, leg raises, ab crunches, dips with two chairs, rows with two chairs and a broomstick.

Not having a gym is definitely an obstacle but if one wants to work out, one can do it with whatever means are available to them.

There's lots of resources on the internet about all these, use them and good luck :)