My husband just measured the driveway grade and says it is 13%. Pretty steep!
As for which end: we tried backing in first and that was about to hit on the bottom of the back bumper. We stopped and tried going in forward but that was a bust too with the back end trying to ground out on the street instead. I can try to take some pictures tomorrow but the link you posted looks a lot like our street! We are towing with a minivan too, if that matters (you can probably tell that from my screen name).
We also measured the tires and they are 13". I guess that is the default? If 15" tires and a lift kit will take care of the problem, we can do that! With the swing away hitch, this should fit into the garage but first we have to get it up the driveway
-Amy