i go camping all the time and have a good time doing it, just because you have cf doesn't mean you can't do things like camp, you just have to get creative.
First, if you camp in a state or national park a lot of times you can arrange to take your car to one of those rv hookups that have electricity to them already to do vest and so forth, the park rangers are typically very cooperative with it.
Second, you can buy an inverter for your car, get a bigger one, at least as many watts as your vest, you're probably best off to run it directly off your battery on your car, have the engine running or you'll kill the battery for sure, it's still hard on the alternator and battery but not as much, you can do the vest in the car, not very conveinent but it works none the less, i do it a lot when i can't get to an RV outlet.
Just talk to the park rangers and explain that you need electricity for medical equipment and they can usually get you to some. If you are camping out of a state/national park you obviously can't go ask the park ranger, so it'll be easist to do the inverter thing in the car.
I hope you are able to continue to camp and enjoy the outdoors as i hope to do for years to come. Don't let cf define you, but at the same time don't ignore so a campfire might not be a good thing for you to be too close to, it makes my face swell up till i have squinted eyes, but enjoy it anyway.