Our 04 gulfstream 31' has the 310 HP v10. We pull an HHR as a toad. Have done the Ozarks into Branson, across East Tennessee many times, Over Black Mountain in NC, Over the Blue Ridge in Virginia, and I79 up through Wva, and over Cumberland pass in MD. Went to Yellowstone, over the top of the Bighorns. We might not be the first ones to get there, but haven't had to get out and push yet. And the trip to yellowstone was with out older 275 v10, and pulling a ford SW. The v10 hasn't failed us yet. If you can get to Branson, you can get most anywhere. The Upper campground at Norris Dam above Knoxville was an interesting experience, but we got there.