To get to some remote areas, check out the Lemhi Mountain Range and Lost River Mountain Range, South of Salmon and Challis, Idaho. Salmon and Challis National Forest. The headwaters of the Lost River, Little Lost River, Lemhi River, and Pahsimeroi are quite remote and scenic with 12,000 foot peaks. For a little less remoteness, check out the Sawtooth Mountain Area near Stanley. Quite scenic but more people. The headwaters of the East Fork Salmon River are also quite scenic. The Magruder Corrider Road is quite remote between Elk City, Idaho and Darby, Montana. Road is usually passible to small truck campers suitable for rugged roads in mid summer. The Lochsa River and Selway river areas are also quite scenic and remote. Northern Idaho is generally wetter and the mtns less high but also quite scenic and remote. The sagebrush desert south of the Snake river is also quite remote around the Bruneau and Jarbidge rivers. The rivers are in deep canyons but it can be quite hot in mid summer. Just a few ideas, there are many more areas to see. Boondock camping spots are plentiful. Lots of National Forest and BLM administered public lands. Have a great trip.