How many non resident children can fish on an adult fishing license?

I am a resident and am planning on having family in the Coeur d Alene area this summer to camp and fish. Half of the family are non resident but most likely the only children are going to be fishing. Can I as a resident with a fishing license take more than one non resident child fishing under my license as their uncle? We are still undecided who as adults will be purchasing licenses, whether there are both resident and non resident licenses. Secondly what proof would I need to have on my person, or their person, to prove residency for children that are residents?