I would really enjoy some help here!!!!

My good friend and I take a big trip every two years. This year we are riding from Topeka, KS to the Grand Canyon and back. We want to hit some great dirt roads in Utah on the way.

I am wondering if any of you have roads to suggest. We have moderate experience off road. We dont want to over step our bounds but dont mind pushing the limits.

I have a 1150GS and my friend has 1000 vstrom.

Thanks for any suggestions you may have.