We went on the tour about 10 yrs ago - and yes, it was at Studio Park. I think it's $10 but if you're a customer you're charged $7.50.
I was enthralled with it. Totally fascinating how they pack the items being shipped out and why, the monitors, the sets, the outdoor sets - everything was great.
I think it would be difficult to have it in any more populated area since they're so spread out!
And yes, they have 3 overnight suites for TSV guests (and those being there frequently throughout the day). They're named room Q, room V, & room C. Very cool, indeed!!!