I havnt had a bike without a dynamo hub for many years....... Probably 25 years now. I started with old Sturmey Archer GH6's and then went for Son dynamos.
Current bike has a Son28/E-werk combo which powers my lights (front and rear), Edge 800 gps and my phone.
I"m in the process of building up a trailer with a second Son28 to hopefully charge my laptop and camera.
I wouldn't be without one.
If I was doing a tour of a overseas third world country like the above, I'd make sure my front wheel was new to minimise failure.
I dont use the lights much on tour, but nothing could be worse than sitting in the campground bathroom or kitchen waiting for things to charge being too scared to leave in case they are stolen.
Even bigger a deal over here in Australia is the distance between towns can be many days so relying on campgrounds would see you doing without.
No need to do without in this day and age.
.