If you want to claim and protect these sites, then you have to have access to them. We can't even put a man in LEO for the foreseeable future.
By international treaty, any location on the Moon can be claimed by no nation. Even a pedophile like Dayton can freely visit. Now whether he'd be able to return to Earth, that's a more complicated question.
You know that has to eventually change once the Chinese start putting colonies, mines, and factories there.
There is no reason why some form of internal combustion would not be possible in a vacuum. Probably involve multiple tanks of compressed gases, and it wouldn't be at all practical to launch all those heavy, inefficient parts into space, but air-filled tires in a vacuum, that's a bit of an obstacle.
So how much would Smaller Gubmint charge the taxpayer to maintain these sites? And on a not-unrelated topic: Five Popular Misconceptions about NASA
I think governments probably would respect those sites. It's actually the private sector that concerns me on this one. Look at what they've done to the Titanic.
The United States does not own any part of the moon and therefore any country landing on the moon can lay claim to that abandoned stuff and there ain't shit can be done about it.
At best, they will rapidly lose air pressure in a vacuum. At worst, they'll fucking explode (I think this is more likely). It's why the lunar rover rolled on wheels formed from a mesh of something similar to piano wire. I'm guessing you already knew this, though.