I would highly suggest you don't do either in a alltrack. You could easily cook your transmission going up to Coyote Flats and it would be very difficult trail for you.
Monache is easier but I would not attempt it.
They are not car trails. I know people go in subarus and rav4's but you risk serious damage.
If you're determined, go with someone that can strap you out of obstacles and be prepared for damage with extra oil, coolant and atf. and kit to repair cracked metal.