[Clubber]

>are living in motels, hotels, trailer parks, or camping grounds due to the lack of alternative adequate accommodations

To me it reads the following aren't adequate accommodations if they are by themselves (i.e. no other housing): motels, hotels, trailer parks, or camping grounds.

I personally don't think a trailer in a trailer park with an address should be categorized as homeless, I'm just trying to interpret the law as a layperson. Maybe trailer parks were different back in 1965 (i.e. no address).