Captain Ned wrote:
They'll also help with generator power, as gen sets (unless really high quality/expensive ones) tend to be stepped square wave output instead of sine wave output.
You're thinking of an inverter generator. For those not up on portable generator tech, an inverter generator is effectively a UPS front end being feed by a generator back end. It lets the designer use a high frequency AC section and decouples the engine speed from the AC line frequency. In a "direct" generator, http://powerequipment.honda.com/generat ... -generatorhttp://www.jkovach.net/projects/powerquality/
Not that it is of any help to the OP, of course as he may be stuck with what ever is there. That said, a cheap UPS is likely to work even less well with crappy generator power. They aren't designed for that. A laptop power brick is about as forgiving a switching power supply as you are going to find. The front end is going to directly rectify the incoming AC to DC without going through any sort of transformer. The only thing on the front end that will be sensitive to crappy power is the power factor correction components. From the point at which the power becomes DC, incoming wave form no longer matters. For a switching power supply, over voltage is more dangerous than under voltage, especially with a 220V input. The main storage capacitor on the input side will have a maximum voltage rating. A significant over voltage could exceed that rating and shorten its life span.
All the concerns of the OP are valid, but the solutions to them, if needed, are not something you buy without knowing exactly what type of problem you are needing to solve and a likely not something you can just "throw in your luggage".
Best of luck in your adventure.