I currently own a Jeep Grand Cherokee and previously I owned a Chevy Blazer. I can honestly say I've never encountered a Forest Road that really required 4 wheel drive, at least any Forest Road the was listed in any of the descriptions in the TrailDEX. I frequently take El Olso from 87 to 88 and I've been on all the Forest Roads on the Rim. I am also the self professed expert on Mount Pelley road conditions. the only rules we live by is that we never travel the Forest Roads if it's snowing, raining or wet. Two reasons for this policy: #1, I grew up in Michigan and when you slide off a logging trail, it's a real nuisance and a major pain if you have to wait for help to arrive. When you slide off an Arizona Forest Road it can turn into a 'Near Death' experience very quickly. I once slide down 1/2 mile of the Hells Canyon Wilderness road when we were caught in a rain storm, and the experience lastest long enough for me to ponder my life, my loves, and my pursuit of happiness.
#2 It screws up the roads when you travel on them when they are wet. Some of the Forest Roads only get graded once in 5 years.
I guess Patty and I have always viewed the Forest Roads as a way to get to the hiking trails. When the road turns into a 4X4 challenge, that's when we turn back. I'm not into the thrill of 'Offroading', I think it cool for others but I'm not into playing on Saturday and wrenching on Sunday.
I think Joe hit it on the head with this Topic and it never hurts to ask if anyone has updates on road conditions.
Mother nature seems to like humans, and not just because they taste like chicken