I can only speak as a visitor to the MTE area although did many years over in the back carpark in the stationary engine section. But the miniatures are in a large hotel carpark so I imagine there's no issue with your parking, however you have to be there early as they close the road around 0700 or 0730. I used to come down the night before. For me, I would have to leave at 5am
If I get accepted I might have to ask to stay at King Edwards Mine again and then tootle over in the morning. KEM used to have an open day on the Sunday so I would make a weekend of it
https://www.google.com/maps/@50.2104...7i16384!8i8192
It's the Lowenac hotel if the link doesn't show correctly.