http://www.fs.fed.us/r4/caribou-targhee/
http://www.fs.fed.us/r4/caribou-targhee ... king.shtml
Pretty good maps of some of the areas around SE Idaho. Best printed in color, so you can tell the trail type. Gives you a rough idea of trail type. The ATV trails are good family trails, it's hit or miss on the motorcycle trails.
Some like Burns, and the upper end of Black canyons are not family trails. If it gets bad, it will get worse, so please turn back if you are not experienced and prepared. Trust me, when they say non motorized, they are non motorized and you will be sorry.
I've printed them, and trimmed some up and over layed them so it shows more area on one larger page.