MH or TC - Which is better to get into the Boonies?

Well, perhaps not as far into the boonies as you plan but we've gone about 20 miles on gravel roads with our 40' motorhome in the West. Of course, they had to be a good gravel road - no boulders to crawl. We towed our Jeep for getting further back and exploring.

If we were unsure of the road condition we just unhooked the Jeep and did a little scouting before taking the motorhome in. It worked for us and we did a lot of boondocking. Just depends where you want to go.