That had been our plan this year too. I had wanted to take 3 weeks and we were gonna hit the same area in September and do Black Bear Rd and others then head down to Moab for more but alas my employer won't give me my vacation leave.
I very highly suggest you pick up a copy of 4x4 Adventures Colorado
by Peter Masey. Excellent books with lots of history and great pictures and descriptions. He also has books for Utah, Arizona, and California. They make great "dreamin'" books for trip planning. He covers easy to moderate trails for "any SUV". And no the price isn't $138 as Amazon states. He has his own web site too I think. Anyway you can find it for around $25.
Have a great trip and send pics of what we are missing.
Oh well maybe next year....Sigh...