SMORR from what I hear is one of the best in the Midwest. I've yet to go but all I hear is great things. Super trails, great facilities, clean, great owners.....ect
Wa$hita Off-Road near Farmington.
http://www.wa****aoffroadtrails.com/ Great trails with big rocks. They are slowly getting their camping area together. They do have electric, water, hot showers and a pavilion but it's more about the trails.