The roads in the Ed O Taylor are basic 2-tracks, most vehicles can get to the Outlaw Cave area then after that its a lot of horse and UTV traffic.
I have never been on the southern portion of the Ed O Taylor, but the roads outside of it are pretty iffy too. A few wet creek crossings that require a high clearance 4x4 to cross. I chose not to cross one in my F-150 4x4 last year and had to circle back 8 miles. I might have been able to cross it, but if I got stuck or screwed up my truck I my hunt would have ended. We were looking for doe antelope, so it wasnt worth it to me.