Yup, not brain surgery.

In my recreational reading of prospectors/trappers/homesteaders accounts of living in wilderness areas in the "old" days, I seem to recall that they often used not much more than pieces of old rags, a small weight of some kind, and string to clean a firearm. Maybe some oil and/or powder solvent if they had it, or no oil even in below freezing weather (just store the gun outside in the cold so moisture didn't condense on it coming in and out of the warmer cabin--leading to a rusty action). Tie the weight on one end of the string, the patch on the other. Drop the weight down the barrel, pull the patch through. Simple.

Nowadays, I get by with some Breakfree, a brass brush, and a cleaning rod with a couple tips. That's all that's really needed if you can cut up an old t-shirt for patches.