I grew up in rural Wyo also. But i am pretty sure my dad would NEVER have let me and my brother go hunting alone when we were that young... an 11 yr old is more than capable... but a 5 yr old?? and NO adults?? thats just incredibly foolish...
I also grew up in Wyoming. If memory serves correctly I could get a youth license at 12 but had to have an adult with me until I was 14 at which time I could hunt on my own. Pheasants, Ducks, Geese and Prairie Chickens were my favorites.