Does it have ample and secure parking for vehicles pulling trailers with atv,s on them ?

Not particularly as far as I remember. Just open parking

Nothing particularly secure, but Ely isn't known for its violence. I imagine it would be fine.

Parking area is lighted and close to building but not patrolled by security.

There's room enough but not secure although the parking does. Sit right one great basin Hwy and is patrolled frequently day and night