If you have a generator, I'd suggest a small 120V compressor and using the generator if you need to inflate a tire where you don't have other electricity available. I carry a Fini AirBoss compressor and have been very happy with it for this sort of use; it's one of the most compact such units available that I've seen, and it's comparatively quiet--which means it's merely quite loud, rather than really, really, really loud.
The air hose generally connects via a pneumatic quick-connect fitting, and the inflation chuck to the air hose with a similar set of fittings. These are standardized (though there are a few different standards, "automotive," "industrial," and "commercial" if memory serves, which are not always miscible) and readily available from most anyplace that sells air tools.
For the inflation chuck, do be sure to get a dual tire version, and I'd suggest one where the nozzle for the inner tire is straight in line with the main tube of the body, rather than set at an angle. I'd also suggest getting a set of decent quality air-through valve caps for your tires, which will save a lot of aggravation compared to ordinary valve caps.
