Hey Vader! Greetings from Saskatchewan.

I don't know if they company you are going to work for requires it but the general standard for assistant guides is a 40-hr Wilderness First Aid course. For lead guides the standard is an 80-hr Wilderness First Responder course. The standard FA course (16-20 hr) doesn't go into enough detail and is geared for the urban environment. I learned TONS (TONNES?) last year while on my WFR course mostly because we dealt with well over a hundred medical and trauma scenarios. Being able to think a bit sideways (the gut pain in your female patient might not be an appendix but rather a tubal pregnancy she didn't know about!) Wilderness is defined as being more than 2 hrs from advanced medical care.

Once you've taken an advanced FA course, you will have a good handle on the type of first aid kit should be in carried for the group and what type you may wish to carry on your person. As far as the meds go - make sure you check with your prescribing physician and legal counsel that you can issue to anyone else but yourself. It may be OK for yourself but unless you really know how to diagnose other's medical needs, then giving drugs to others has some real legal issues.