When I lead trips for the CMC (California Mountaineering Club) I was pretty much a hard-a**. I would lift everyone's pack, and simply take unneeded extra stuff out of their packs. Because, once you form a "team", each person is responsible for the other - and that means if someone poops out the group carries their gear. The expedition is only as strong as its weakest link.

I quit leading trips because I became burned out and on the last trip there was a huge breach of safety due to participants not following the agreed upon procedure. And this was on a technical climb so someone could easily have been killed. Maybe you should just take a break for a while. After all you have done, nobody would think less of you.