Welcome! My sister and her family live in Boise! Was just there last summer.
Rick asked about campgrounds in Idaho . . . where to begin.
Last summer we stayed at Smiley Creek Lodge, near Ketchum , in the Sawtooth National Forest - HWY 75. They have a number of full hookup and water/electric sites. Nice place with a good little restaurant and store. Smiley Creek Lodge - Sawtooth Idaho – Your Headquarters for Winter and Summer Fun
Further north, on US-12, is Three Rivers Resort, near Lowell. Motel, cabins, and RV sites nestled at the confluence of the middle fork of the Clearwater River, where the Lochsa and Selway rivers meet. They also have a rafting and kayaking company that operates out of the campground - and you can float the Selway and Clearwater on your own if you have tubes, etc . I HIGHLY recommend them! Three Rivers Resort and Rafting
About 5 miles upstream of Lowell, along the Selway (Selway Road), is a beautiful NFS campground - O'Hara. Level, paved sites - all shaded and some along the river. No hookups, but there is water on site and pit toilets. Beautiful campground!!!
And there are another 5 NFS campgrounds along US-12 going up and over Lolo Pass to Missoula, MT. Stayed at a couple over the years. Again - no hookups, but gorgeous campgrounds (and Jerry Johnson has natural hot springs).
Idaho is a GREAT state for camping!