One of the trailers is the "Mystery Trailer" featured in one of the threads here in May '07.
http://tnttt.com/viewto ... highlight=
It is an interesting exhibit. Even though we were not museum members we were able to join in a "Museum Members Tour". My friend called ahead and made reservations but it not a problem at all. This tour was at 7:30PM and the parking in the building was free then and my Senior discount cost only $5.

They hoisted the trailers up via crane to the upper level and had to cut the entry doors to expand another 2 ft higher to get them inside.
They had a post war exhibit a couple years ago but this one is limited to pre-war years.
If you are in the Westwood area of LA it is well worth a visit.