Period in the wilderness

I was super emotional this past week and when I started crying in the bank today I decided to check <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> and saw my period starts in 3 days. This was fine until I realized it starts on the exact date when I leave for a 5 day backpacking trip with my my two friends and their dads. It's too late for me to cancel but if I get it on the trip my cramps will kill me every day that we will be walking 10+ miles. And idk how to dispose of the tampons or what to tell their dads if I start during one of the hikes and I need to suddenly stop. So idk what to do. Suggestions welcome please