I've also been there. I love camping in the U.P., and "discovered" the rocket range about 15 years ago. I didn't drive out there though, I walked. No one I talked to knew what condition the road "out to the very end of the peninsula" was in, so I decided not to risk it. It wasn't a bad walk, really. Good boots, and as mentioned, industrial-strength mosquito spray, are necessary. No one mentioned the old rocket range, so that was just a happy bonus.<p>I've not been back for 8 or so years, but I can't imagine the road has gotten any better, but I'd make the hike again.<p>On your way up to Copper Harbor, stop just north of Houghton at the Quincy Copper Mine. Even if you don't take the underground tour, take the tour of the hoist house; it was (still is?) the world largest steam hoist, and it is in remarkable condition as a relic of the steam age.