After doing my homework for many hours, here what I got. Keep in mind, I'm doing a build, "vintage" style, new school tech...
Hub Generator: SON 28 ISO Disc $315 - my reason for this hub is the reliability, dependability, and engineering vs the other companies (peace of mind, but I agree, higher cost) - Phil Wood Rear Hub.
I looked at the Sinewave Cycles Revolution, USB Charger $120 - It's a 5V up to 1 Amp. The FAQ's on the website addresses the usage of headlights and USB Charger at the same time. Pasted the details:
Q. Can I use the revolution and my lights at the same time?
A. Yes Simply connect the wires to the dynamo along with the headlight cable (in parallel). The dynamo power will be shared by the Revolution and the headlight, so we advise unplugging your phone/gps/device being charged to ensure that your headlights are at full brightness. You do not need to disconnect the Revolution - it draws practically zero power when not charging a device
So it seems, as I understood, that the Dynamo Lights will still work but at lower levels. This could remove the battery secondary lighting system, right?
To keep things clean and simple, I'm wanting to charge only a battery pack, HyperJuice AC (100wh / 26000mAh) $159, then charge any gadgets that may need charging at the end of the day.
Simple gadgets include: (not using Cell Phone, Garmin, GPS, etc.)
SanDisk Clip Sport MP3 Player
Point and click camera, rechargable in the camera
UCO Vaper+Rechargable Headlamp
Google Nexus 9 Tablet (reading, writing)
Dynamo Light set-up will be from Busch & Muller:
Rear, Line Brake Plus to fit with the Tubus Cosmo Rear Rack.
Front, IQ-XS (looks classy) it fits the space.
Keeping MSN battery options as a consideration, here are my options:
Spanning Pixeo Xb Chrome with Cage $25 - 2x AAA batteries (Rear Light) *120 hours
Soma Torpedo MK2 Steel Chrome $60 - 4x AAA batteries (Front Light) *6 hours steady, 12 hrs Flash Flashing
I'm not sold on the Soma light but only one with aesthetics - know of something else?
Note: The reason i didn't want batteries, is because I'll be broke on my trip, and didn't want to purchase batteries. So if I purchase rechargable AAA batteries, how am I charging? What system is recommended?
Again, if there is anything I'm not understanding or missing, please let me know.