Here’s one from my significant other’s mountaineering class. I froze my ass off camping in in Bryce Canyon so you don’t have to.
While camping, you can fill a large nalgene (or other water) bottle with hot water before bed, and put it in your sleeping bag for extra warmth all night! If you find the surface a little burn-y to your skin, you can wrap a bandana around the bottle.
Bonus warmth points if you drink all the water once you wake up. Staying hydrated, friends!
Discovery in the desert, Moab, Utah near Arches National Park:
While on the road, you can use a large Nalgene bottle (or other water bottle) as a stand-in for a foam roller to roll out your thighs and other muscles, a great plus if you, say, went for a hike while car camping and have sore muscles! For my petite frame, my size water bottle worked (see slightly awkward feature photo for this post). If you have larger thighs, try a longer water bottle. Gonna be thirsty anyway.