I have a kit made up for taking to distance matches, I carry a Lee hand press in it. They are not as convenient as a bench mounted press but they work just fine.
Another option is that Midway sells a small break-down table with a plastic base, a round tube and a plastic reinforced top that can be drilled and used with a regular bench mounted press, I have one of those also but it takes up more room so I don't take it unless I expect to do quite a bit of loading on an extended trip,

drover

223 Rem, my favorite cartridge - you can't argue with truckloads of dead PD's and gophers.

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