Is the lawn/general admission area accessible to someone in a wheelchair that can't walk ?

There is a handicap accessible walk way on the south side of the entryway. . That will bring you upnto the lawn area.

Yes, it is wheel chair accessible.

Yes remember this state property so the are fully compliant

yes, very easily accessible, there is a special side entrance for wheelchairs, crutches etc.

Yes, plus there are ADA specific areas on both the south and north plazas.