also Fritos, hand sanitizer, dryer lint, don't forget cotton balls dipped in vasoline 🙂
but more to the topic,
I'm going to say cooking tips.
Reusable menstrual cups are lifesavers for longer day hikes and backpacking trips! I've found you don't have to change them as often as other hygiene products, so you can spend more time enjoying the outdoors.
@Former community member - I have the same sentiment! They have been game changers for when I spend long days out climbing or paddling. I was thrilled when REI started carrying them. The more time I get to spend focusing on the exciting activities I'm getting into, the better!
A Nalgene Drop Dispenser Bottle filled with water is a great way to keep your lady parts fresh when you are reducing your use of biodegradable toilet paper, or when only toilet paper simply won't do!