Is there a parking lot around there. Because it looks like there are only a few stall at the museum itself.

They do have there own parking lot that will fit a decent amount of vehicles and they have people working the parking lot to let you know where to go

Yes, there is a parking lot, just next to the museum.

Free parking in the back. Security guards on duty

Yes, in front only a few cars will be able to park, but the back has a nice lot for several cars.

It also has parking in the rear with security on property