Those three or four UP trails originally posted in the question I have rode just recently (10/20 thru 10/25) and they are all super simple trails. Nothing extreme or technical about any of them. I'll even go so far as to use the word boring if you're looking to actually use your jeep. You don't really need 4 wheel drive for most of them thought it would help. Some of those retired forest roads can get pretty sweet though. Drummond Island is pretty sweet. A few seasonal roads that got really crazy, even for my Rubi. And Turtle Ridge ORP is there too, I highly suggest that if you're lifted. Highway 41 ends in Copper Harbor, but there is some dirt roads that go way back to the very tip of the penninsula, again, if you're up that far, try those, nothing too crazy, but they can get a little hairy, and the view and solitude at the very tip, knowing you're the only ones for 15 miles or so is amazing.