There are a couple around here that are "U pull it" $2 to get in, you sign the release paper, all of the newer stuff is up on blocks, but the "older" section has everything on the ground. Yes I said older area, Two of them have a special section that is for cars and trucks from the 70's on back....there are even some 40's stuff...all hammered pretty hard, but you can still find some good parts. The two also have a special "for sale" area (can't strip anything off the cars in this area), and the one has a couple 50's (50 Chevy, 58 Ford and some other stuff), but for what is there I think the prices are a little steep.
Personally, I'm glad that they are around here...I save a heck of a lot of money on my projects there....as an example....full power leather interior (front and rear seats, console, shifter, wiring harness for the power seats, and a bunch of misc trinkets) for $40.
As far as the legal end of it...I know I have a different out look then a lot of other people, but if I'm a dumb a$$ and hurt myself doing something there (or anywhere for that matter), then I'm a dumb a$$...nobody's fault but my own.