I've no experience of it. All I have is some understanding of how standard room treatment products work and I can't see using your LPs in these two ways as having much impact.
A typical room, even one that is quite large by most listening room standards, with typical box type speakers, will still likely have issues with smooth bass response. Only large bass traps, usually placed in the four wall-wall corners of the room, will have a good impact.
If no-one comes forward with experience of your ideas, you could just experiment by, for example, putting all the LPs down one side wall on the floor and listen for any change in sound.