You can also just get a big enough battery bank to keep you going the weekend, unless you are going longer. Something like this will get you at least 5 full phone charges, and still keep you entertained if it rains all weekend.
https://www.amazon.ca/Anker-Portable...p_ob_title_wld
If you want, later you should be able to pair it with a solar panel and have the panel charge it, here's a random one.
https://www.amazon.ca/ALLPOWERS-Fold.../dp/B08DKTZY7G