If you keep it well oiled (seasoned with Ballistol) you shouldn't need to clean the trigger group more than every 5-10 range trips. I like to keep my rifles well cleaned though.
Ballistol and water (moose milk) with allow you to flush a rifle and if a small amount of water remains behind, so will the Ballistol, to protect it. When the water finally evaporates, the Ballistol remains.