HELP! Cup and Concerts

So I’m newer to the cup, I got a Lena cup last month right before my cycle started so I’m on cycle #2 with it. I’m coming off OCP (last inactive pill tomorrow) and today is CD #1.

I have a 3 day outdoor music festival starting Thursday and I have a feeling that I will still be on my cycle at that time. While at the festival, only portapotties are available, but I will be home each night and able to clean like usual with the cup soap I have and running water. They also do not allow you to take in water bottles.

My biggest concern is, should I need to empty it at the festival, how should I clean it? I have individually wrapped summers eve unscented wipes, flushable wet wipes, and will also be taking mini packs of Kleenex (facial tissues).

TYIA!