Having camp vaped with the below listed units, I can only really recommend the Vapcap.
Granted, I go interior camping and I make it a good 30-50km up the rivers and lakes before I make my site. These are my experiences with vapes thus far:
Crafty - too few bowls, have to charge too often. Live in constant fear of the weather ruining hundreds of dollars of vape.
Solo I - glass stems in the dark with only a headlamp to guide you was hard and one dropped stem means your camping trip is over. Forgot that it does not have USB charging - it sat in my kit taking up weight for almost two weeks. Great battery life until it dies tho.
Dynavap - I brought my M and my VONG. I was always afraid of the wood of the VONG getting soaked. The M I was happy to experiment with, including setting it up by the fire to click. When it was rainy in the tent, however, it was a real nightmare because of the noise. Also, that tip, if it falls in your tent, will leave a lovely mark. If the cap is gone, you at least have a nice little one hitter that you can power-clean when you get back home.
My dream vape for camping would be an 18650 set up like an Air I which I feel handles getting beat up a bit better than the Air II. You can safely pack a fuck ton of mAh away and swap batteries out. If you have a solar charger or something while interior camping, maybe the above (except the Dynavap) changes. If you have access to a safe dry space or a car or whatever, the above (excepting again the Dynavap) changes.
I won't lie. After a few expeditions with vaping, I have kind of given up the ghost. I can pack down my herb, some papers, and so on much more lightly than anything but, again, the Dynavap. Replaceable batteries, USB charging, and not feeling bad if it is devastated by nature are the things you need for vaping in nature. I am sure that are ways to do it super well, but I ain't found them for my style of camping.