Need advice on T206 scrapbook removal

[Browncow75]

I know, I know...its a touchy subject. But these are staying in my personal collection so there wont be any disclosure needed when sold. I picked up these 2 scrapbook pages today (scans below,one scan wont load), and while they arent in the greatest shape, there are some saveable HOF'ers Id like to remove from the cardboard pages. The main issue I have is, Ive never soaked cards before, and with them being glued down on both sides of the pages, Im not sure how to go about doing it since they cant be cut individually and soaked. What I need to know is: Would you soak a whole page at a time, or use an exacto to lift a few layers of cardboard and try to cut part of the way through the backing without going thru to the other side? How long do I soak them to help insure that the cards dont come apart? Granted, Im not looking at a ton of cash in these cards, but there are some T206 southern league'ers and the Caramel Mathewson Id like to rescue from the pages. The cardboard backing is very brittle, so I wasnt sure if that would be a help or hinderance! Any CONSTRUCTIVE advice is appreciated! Thanks!