I've never considered it worth a visit, I think my wife was there as a teen in the 1960s.
There is a lot of fuss about it being in the "wrong spot" because 19th century surveyors didn't put it just where Congress specified, not just tech, they were using a different earth model for measuring coordinates (since changed at least three times). But it is actually in the right spot, because legally, the SW corner of Colorado was defined to be at the monument location, and since then almost all other state borders have been defined to be at surveyed locations rather than satellite-based numerical geographic coordinates, which continually change as the Earth's crust moves around with respect to a space based coordinate system.
Parking will not be a problem. You don't have to buy any more Native American handicrafts than you wish to buy, although the sales pesence seems to be an issue for a lot of people. If gotten used to this around. the world, where empoverished local residents try to eke out a living selling their crafts to fabulously wealthy visitors, and I don't really mind my wife and daughters helping them out a little.