Mostly, I was hoping there was a simple solution, since I don't need a huge voltage boost. The USB power sources are lithium rechargeable, pretty good capacity 2 & 3 Ah. The 2 Ah chargers are solar, and will charge the battery and power the USB at the same time, sun available. I haven't fooled around with lithium ion batteries, so a little skeptical about the series idea for a couple of reasons. First they are something like 3.6 volts, and need a boost circuit to get 5 volts out for the USB, not sure enough to risk frying something, or burning down my house, if the aren't friendly that way. The camera will work off a 9 volt battery (clip with plug included). I could provide power a number of alternate ways, but the USB packs have good capacity and small size. The solar ones would be perfect with a little boost.
Back to the 7660... I hooked my meter in series with the camera, and it's drawing on 54 mA, about half of what I need. The unloaded output of the circuit was 9.7 volts (little higher than expected). Thought those diodes would have a higher drop. My brother dropped by for a visit, need help on his laptop. Got my first look ad Windows 7, and not a fan, maybe it gets better with use. Finally left, after relieving me of a printer cable, and a few other odds and ends. Will do some more measurements later, maybe re-wire the circuit. Only a few parts, and does double the voltage. Have to check my USB voltage, could be 5.5 volts, and would explain the higher than expected output.