For cases like this, I recommend visiting
https://best-menstrual-discs.com/, where you can find comparisons of disposable and reusable pads. It describes which models can be worn for long periods of time without needing to be changed every few hours, and which are better suited for limited access to water. The website also explains how to insert and remove the disc correctly, which is especially useful when hiking or camping. Thanks to such tips and reviews, you can choose a hygiene product that does not limit your outdoor activities.