Thanks for the welcome, and the suggestions.
The air filter was very dirty (I drive in very dusty areas) so I cleaned it. There was a bit of dirt in the fuel filter, an after market glass filter that is supposed to be good quality, and I cleaned that. I think it's functioning OK. The spark plug appeared ok, a little bit of crud that I cleaned off, then reinserted.
The clogged carb jets... is there some way I can check this or is it best left to a mechanic? I'm 50 miles from the closest repair shop and don't want to trailer it through the mountains to get there on my own.