A reference I reallly like is "Medicine for Mountaineering," by James Wilkerson. It assumes an isolated, potentially hostile environment, and goes well beyond standard first aid measures. I had the pleasure of meeting the author on Denali, where he monitored and critiqued our handling of a pulmonary edema victim. He is the real deal.

There are similar books produced for yachtsmen and long distance voyagers, but I don't have the titles at hand.

A variation of your cough remedy - equal parts of tea, honey, and bourbon. This was given to me by an MD years ago. He said it was as good as any cough medicine on the market. It has always worked for me.